Hello,
Debian Bullseye (Exim 4.94.2), but that's not the culprit, just the instigator. ^o^
We changed our MSAs to the above Exim version, which was already in use on
the MXs, no problems there (but they are v4 only).
On the MSAs we added IPv6 and noticed this oddity when delivering large
mails (over 128KB it seems) to google/gmail via v6:
---
2022-02-16 13:53:35 1nKCJq-0006Lv-Os <= user@here H=(STHMBN0004) [210.227.29.146] I=[203.216.5.116]:587 P=esmtpsa X=TLS1.2:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256 CV=no A=user@here S=3993335 id=022401d822f1$27c2cc10$77486430$@???
2022-02-16 14:05:48 1nKCJq-0006Lv-Os H=aspmx.l.google.com [2404:6800:4008:c15::1b] TLS error on connection (send): The TLS connection was non-properly terminated.
2022-02-16 14:05:48 1nKCJq-0006Lv-Os H=aspmx.l.google.com [2404:6800:4008:c15::1b]: SMTP timeout after sending data block (485631 bytes written): Connection timed out
2022-02-16 14:06:04 1nKCJq-0006Lv-Os => user@there R=dnslookup T=remote_smtp S=4046067 H=aspmx.l.google.com [142.250.157.27] I=[203.216.5.76] TFO X=TLS1.3:ECDHE_X25519__ECDSA_SECP256R1_SHA256__AES_256_GCM:256 CV=yes DN="CN=mx.google.com" K C="250 2.0.0 OK g22si38934681pfj.180 - gsmtp"
2022-02-16 14:06:04 1nKCJq-0006Lv-Os Completed QT=12m29s
---
Any mail over 128KB as I said seems to be affected, nothing more that
around 480KB ever gets written.
Now the reason this happens is that the local iptables
(Established, Related is set) is starting to reject packets coming back
from google to here after about 2 seconds. (dump attached)
I can't find anything in the various conntrack knobs to fiddle which would
be related to this behavior, if somebody has any ideas, enlighten me
please.
Of course the google load balancer playing silly buggers may be an option,
too.
This does not seem to be related to chunking as was my initial thought,
because after setting
hosts_try_chunking = !*
in remote_smtp (and yeah, mails to the MXs no longer get chunked so I know
that actually works) the problem persists.
Deliveries via v6 to other servers with large mails (1MB and more) is
working fine, some I'm still casting a gimlet eye at Google...
What confuses me is in addition to this happening at all is that the
packets in the dump don't seem to add up to 480KB worth of data.
I noticed that ALL these affected mails get re-tried by exim using v4, is
there some logic present that goes "if address family a fails, try family b
before any further IPs from family a"?
Regards,
Christian
--
Christian Balzer Network/Systems Engineer
chibi@??? Rakuten Communications
13:53:35.696657 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [S], seq 2713119254, win 64800, options [mss 1440,sackOK,TS val 1616897287 ecr 0,nop,wscale 7,tfo cookie bf3c7c4b44f13b18,nop,nop], length 0
13:53:35.734424 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [S.], seq 322644837, ack 2713119255, win 65535, options [mss 1440,sackOK,TS val 4215004432 ecr 1616897287,nop,wscale 8], length 0
13:53:35.858533 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 1:53, ack 1, win 256, options [nop,nop,TS val 4215004556 ecr 1616897287], length 52: SMTP: 220 mx.google.com ESMTP h11si6141745pfv.60 - gsmtp
13:53:35.858568 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], ack 53, win 506, options [nop,nop,TS val 1616897449 ecr 4215004556], length 0
13:53:35.858633 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 1:30, ack 53, win 506, options [nop,nop,TS val 1616897449 ecr 4215004556], length 29: SMTP: EHLO smtp04.dentaku.gol.com
13:53:35.896720 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 30, win 256, options [nop,nop,TS val 4215004594 ecr 1616897449], length 0
13:53:36.019236 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 53:229, ack 30, win 256, options [nop,nop,TS val 4215004716 ecr 1616897449], length 176: SMTP: 250-mx.google.com at your service, [2403:d000:4:11::5:76]
13:53:36.019260 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], ack 229, win 505, options [nop,nop,TS val 1616897610 ecr 4215004716], length 0
13:53:36.019322 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 30:40, ack 229, win 505, options [nop,nop,TS val 1616897610 ecr 4215004716], length 10: SMTP: STARTTLS
13:53:36.057559 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 40, win 256, options [nop,nop,TS val 4215004755 ecr 1616897610], length 0
13:53:36.175776 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 229:259, ack 40, win 256, options [nop,nop,TS val 4215004873 ecr 1616897610], length 30: SMTP: 220 2.0.0 Ready to start TLS
13:53:36.175800 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], ack 259, win 505, options [nop,nop,TS val 1616897766 ecr 4215004873], length 0
13:53:36.189490 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 40:557, ack 259, win 505, options [nop,nop,TS val 1616897780 ecr 4215004873], length 517: SMTP
13:53:36.226956 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 557, win 261, options [nop,nop,TS val 4215004925 ecr 1616897780], length 0
13:53:36.231133 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], seq 259:1467, ack 557, win 261, options [nop,nop,TS val 4215004925 ecr 1616897780], length 1208: SMTP
13:53:36.231180 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 1467:2675, ack 557, win 261, options [nop,nop,TS val 4215004925 ecr 1616897780], length 1208: SMTP
13:53:36.231181 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], seq 2675:3883, ack 557, win 261, options [nop,nop,TS val 4215004925 ecr 1616897780], length 1208: SMTP
13:53:36.231358 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 3883:5091, ack 557, win 261, options [nop,nop,TS val 4215004925 ecr 1616897780], length 1208: SMTP
13:53:36.231358 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 5091:5173, ack 557, win 261, options [nop,nop,TS val 4215004925 ecr 1616897780], length 82: SMTP
13:53:36.231431 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 557:563, ack 5173, win 471, options [nop,nop,TS val 1616897822 ecr 4215004925], length 6: SMTP
13:53:36.232551 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 563:637, ack 5173, win 501, options [nop,nop,TS val 1616897823 ecr 4215004925], length 74: SMTP
13:53:36.235891 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 637:688, ack 5173, win 501, options [nop,nop,TS val 1616897826 ecr 4215004925], length 51: SMTP
13:53:36.273539 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 637, win 261, options [nop,nop,TS val 4215004968 ecr 1616897822], length 0
13:53:36.281766 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 688, win 261, options [nop,nop,TS val 4215004976 ecr 1616897826], length 0
13:53:36.393158 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 5173:5895, ack 688, win 261, options [nop,nop,TS val 4215005090 ecr 1616897826], length 722: SMTP
13:53:36.436043 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], ack 5895, win 501, options [nop,nop,TS val 1616898027 ecr 4215005090], length 0
13:53:36.448073 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 688:3167, ack 5895, win 501, options [nop,nop,TS val 1616898039 ecr 4215005090], length 2479: SMTP
13:53:36.486512 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 2116, win 272, options [nop,nop,TS val 4215005184 ecr 1616898039], length 0
13:53:36.486512 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 3167, win 283, options [nop,nop,TS val 4215005184 ecr 1616898039], length 0
13:53:36.605279 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 5895:5958, ack 3167, win 283, options [nop,nop,TS val 4215005302 ecr 1616898039], length 63: SMTP
13:53:36.605287 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], ack 5958, win 501, options [nop,nop,TS val 1616898196 ecr 4215005302], length 0
13:53:36.892362 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 5958:6021, ack 3167, win 283, options [nop,nop,TS val 4215005589 ecr 1616898196], length 63: SMTP
13:53:36.892388 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], ack 6021, win 501, options [nop,nop,TS val 1616898483 ecr 4215005589], length 0
13:53:36.893137 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [P.], seq 6021:6084, ack 3167, win 283, options [nop,nop,TS val 4215005590 ecr 1616898196], length 63: SMTP
13:53:36.893151 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], ack 6084, win 501, options [nop,nop,TS val 1616898484 ecr 4215005590], length 0
13:53:36.893242 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 3167:6023, ack 6084, win 501, options [nop,nop,TS val 1616898484 ecr 4215005590], length 2856: SMTP
13:53:36.893248 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 6023:8879, ack 6084, win 501, options [nop,nop,TS val 1616898484 ecr 4215005590], length 2856: SMTP
13:53:36.893290 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 8879:11399, ack 6084, win 501, options [nop,nop,TS val 1616898484 ecr 4215005590], length 2520: SMTP
13:53:36.893310 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 11399:14255, ack 6084, win 501, options [nop,nop,TS val 1616898484 ecr 4215005590], length 2856: SMTP
13:53:36.893315 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 14255:17111, ack 6084, win 501, options [nop,nop,TS val 1616898484 ecr 4215005590], length 2856: SMTP
13:53:36.931841 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 4595, win 294, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931841 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 6023, win 305, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931841 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 7451, win 316, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931841 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 8879, win 328, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931841 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 10307, win 339, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931841 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 11399, win 350, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931841 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 12827, win 361, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931841 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 14255, win 372, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931881 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 17111:19967, ack 6084, win 501, options [nop,nop,TS val 1616898522 ecr 4215005629], length 2856: SMTP
13:53:36.931902 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 19967:22823, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.931923 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 22823:25679, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.931931 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 25679:28535, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.931954 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 28535:31391, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.931962 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 31391:34247, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.931973 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 15683, win 383, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.931973 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 17111, win 395, options [nop,nop,TS val 4215005629 ecr 1616898484], length 0
13:53:36.932010 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 34247:37103, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.932028 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 37103:39959, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.932220 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 39959:42815, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.932236 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 42815:45671, ack 6084, win 501, options [nop,nop,TS val 1616898523 ecr 4215005629], length 2856: SMTP
13:53:36.970446 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 18539, win 406, options [nop,nop,TS val 4215005667 ecr 1616898522], length 0
13:53:36.970446 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 19967, win 417, options [nop,nop,TS val 4215005668 ecr 1616898522], length 0
13:53:36.970477 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 45671:48527, ack 6084, win 501, options [nop,nop,TS val 1616898561 ecr 4215005667], length 2856: SMTP
13:53:36.970495 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 48527:51383, ack 6084, win 501, options [nop,nop,TS val 1616898561 ecr 4215005668], length 2856: SMTP
13:53:36.970585 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 21395, win 428, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970585 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 22823, win 439, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970585 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 24251, win 450, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970585 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 25679, win 461, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970585 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 27107, win 473, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970585 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 28535, win 484, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970614 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 51383:52811, ack 6084, win 501, options [nop,nop,TS val 1616898561 ecr 4215005668], length 1428: SMTP
13:53:36.970635 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 52811:55667, ack 6084, win 501, options [nop,nop,TS val 1616898561 ecr 4215005668], length 2856: SMTP
13:53:36.970647 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 55667:58523, ack 6084, win 501, options [nop,nop,TS val 1616898561 ecr 4215005668], length 2856: SMTP
13:53:36.970677 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 29963, win 495, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970677 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 31391, win 506, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970677 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 32819, win 517, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970677 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 34247, win 528, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970677 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 35675, win 540, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970678 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 37103, win 551, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970678 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 38531, win 562, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970678 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 39959, win 573, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970717 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 41387, win 584, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970717 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 42815, win 595, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970717 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 44243, win 607, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970717 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 45671, win 618, options [nop,nop,TS val 4215005668 ecr 1616898523], length 0
13:53:36.970829 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 58523:61379, ack 6084, win 501, options [nop,nop,TS val 1616898561 ecr 4215005668], length 2856: SMTP
13:53:36.970837 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 61379:64235, ack 6084, win 501, options [nop,nop,TS val 1616898561 ecr 4215005668], length 2856: SMTP
13:53:36.971050 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 64235:67091, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971067 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 67091:69947, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971239 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 69947:72803, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971253 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 72803:75659, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971431 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 75659:78515, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971444 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 78515:81371, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971623 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 81371:84227, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971636 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 84227:87083, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971815 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 87083:89939, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971828 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 89939:92795, ack 6084, win 501, options [nop,nop,TS val 1616898562 ecr 4215005668], length 2856: SMTP
13:53:36.971979 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 92795:95651, ack 6084, win 501, options [nop,nop,TS val 1616898563 ecr 4215005668], length 2856: SMTP
13:53:36.971987 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 95651:98507, ack 6084, win 501, options [nop,nop,TS val 1616898563 ecr 4215005668], length 2856: SMTP
13:53:36.972170 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 98507:101363, ack 6084, win 501, options [nop,nop,TS val 1616898563 ecr 4215005668], length 2856: SMTP
13:53:36.972184 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 101363:102791, ack 6084, win 501, options [nop,nop,TS val 1616898563 ecr 4215005668], length 1428: SMTP
13:53:37.008877 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 47099, win 629, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.008877 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 48527, win 640, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.008877 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 49955, win 651, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.008877 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 51383, win 662, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.008914 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 102791:105647, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.008937 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 105647:108503, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.008950 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 108503:111359, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.008996 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 111359:114215, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.009220 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 52811, win 673, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.009220 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 54239, win 685, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.009220 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 57095, win 707, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.009252 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 114215:117071, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.009275 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 117071:119927, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.009290 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 119927:122783, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.009384 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 58523, win 718, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.009384 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 59951, win 729, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.009384 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 61379, win 740, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.009384 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 62807, win 752, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.009384 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 64235, win 763, options [nop,nop,TS val 4215005706 ecr 1616898561], length 0
13:53:37.009469 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 122783:125639, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.009479 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 125639:128495, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005706], length 2856: SMTP
13:53:37.009497 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 65663, win 774, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.009497 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 67091, win 785, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.009497 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 68519, win 796, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.009497 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 69947, win 807, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.009557 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
13:53:37.009578 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
13:53:37.009658 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 128495:131351, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005707], length 2856: SMTP
13:53:37.009668 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 131351:134207, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005707], length 2856: SMTP
13:53:37.009775 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 71375, win 818, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.009775 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 72803, win 830, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.009775 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 74231, win 841, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.009775 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 75659, win 852, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.009798 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
13:53:37.009814 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
13:53:37.009829 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
13:53:37.009844 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
13:53:37.009853 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 134207:137063, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005707], length 2856: SMTP
13:53:37.009863 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 137063:139919, ack 6084, win 501, options [nop,nop,TS val 1616898600 ecr 4215005707], length 2856: SMTP
13:53:37.009902 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 77087, win 863, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010032 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 78515, win 874, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010032 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 79943, win 885, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010032 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 81371, win 897, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010040 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 139919:142775, ack 6084, win 501, options [nop,nop,TS val 1616898601 ecr 4215005707], length 2856: SMTP
13:53:37.010049 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [P.], seq 142775:145631, ack 6084, win 501, options [nop,nop,TS val 1616898601 ecr 4215005707], length 2856: SMTP
13:53:37.010239 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 82799, win 908, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010239 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 84227, win 919, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010239 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 85655, win 930, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010239 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 87083, win 941, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010240 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 88511, win 952, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010240 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 89939, win 964, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010307 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 91367, win 975, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010308 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 92795, win 986, options [nop,nop,TS val 4215005707 ecr 1616898562], length 0
13:53:37.010450 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 94223, win 997, options [nop,nop,TS val 4215005708 ecr 1616898563], length 0
13:53:37.010450 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 95651, win 1008, options [nop,nop,TS val 4215005708 ecr 1616898563], length 0
13:53:37.010584 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 97079, win 1008, options [nop,nop,TS val 4215005708 ecr 1616898563], length 0
13:53:37.010584 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 98507, win 1003, options [nop,nop,TS val 4215005708 ecr 1616898563], length 0
13:53:37.010783 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 99935, win 1029, options [nop,nop,TS val 4215005708 ecr 1616898563], length 0
13:53:37.010783 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 101363, win 1037, options [nop,nop,TS val 4215005708 ecr 1616898563], length 0
13:53:37.010783 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 102791, win 1034, options [nop,nop,TS val 4215005708 ecr 1616898563], length 0
13:53:37.047503 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 104219, win 1037, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047503 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 105647, win 1032, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047625 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 107075, win 1027, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047626 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 108503, win 1022, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047626 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 109931, win 1017, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047626 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 111359, win 1012, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047626 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 112787, win 1007, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047626 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 114215, win 1002, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047918 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 115643, win 997, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047918 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 117071, win 992, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047918 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 118499, win 987, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047918 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 119927, win 982, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.047918 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 121355, win 977, options [nop,nop,TS val 4215005745 ecr 1616898600], length 0
13:53:37.052281 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 145631, win 883, options [nop,nop,TS val 4215005750 ecr 1616898600], length 0
13:53:37.100051 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 145631:147059, ack 6084, win 501, options [nop,nop,TS val 1616898691 ecr 4215005707], length 1428: SMTP
13:53:37.144383 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 878, options [nop,nop,TS val 4215005841 ecr 1616898691], length 0
13:53:37.144442 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
13:53:37.344057 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1616898935 ecr 4215005707], length 1428: SMTP
13:53:37.382724 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215006080 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:53:37.382782 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:53:37.836057 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1616899427 ecr 4215005707], length 1428: SMTP
13:53:37.873690 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215006572 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:53:37.873766 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:53:38.828052 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1616900419 ecr 4215005707], length 1428: SMTP
13:53:38.868875 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215007564 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:53:38.868945 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:53:40.780063 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1616902371 ecr 4215005707], length 1428: SMTP
13:53:40.817934 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215009516 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:53:40.817979 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:53:44.880060 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1616906471 ecr 4215005707], length 1428: SMTP
13:53:44.917683 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215013615 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:53:44.917758 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:53:52.812051 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1616914403 ecr 4215005707], length 1428: SMTP
13:53:52.853179 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215021547 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:53:52.853261 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:54:08.428067 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1616930019 ecr 4215005707], length 1428: SMTP
13:54:08.466526 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215037164 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:54:08.466614 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:54:40.684218 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1616962275 ecr 4215005707], length 1428: SMTP
13:54:40.721740 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215069420 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:54:40.721813 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:55:44.176041 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1617025767 ecr 4215005707], length 1428: SMTP
13:55:44.213684 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215132912 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:55:44.213746 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:57:45.004074 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1617146595 ecr 4215005707], length 1428: SMTP
13:57:45.045177 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215253740 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:57:45.045259 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
13:59:45.836092 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1617267427 ecr 4215005707], length 1428: SMTP
13:59:45.876894 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215374572 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
13:59:45.876950 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
14:01:46.668081 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1617388259 ecr 4215005707], length 1428: SMTP
14:01:46.709013 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215495403 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
14:01:46.709059 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
14:03:37.474615 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215606169 ecr 1616898691], length 0
14:03:37.474693 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:03:37.721355 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215606416 ecr 1616898691], length 0
14:03:37.721414 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:03:37.966397 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215606664 ecr 1616898691], length 0
14:03:37.966448 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:03:38.457944 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215607152 ecr 1616898691], length 0
14:03:38.458000 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:03:39.489106 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215608184 ecr 1616898691], length 0
14:03:39.489168 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:03:41.470182 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215610168 ecr 1616898691], length 0
14:03:41.470244 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:03:45.374547 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215614072 ecr 1616898691], length 0
14:03:45.374623 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:03:47.504229 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1617509095 ecr 4215005707], length 1428: SMTP
14:03:47.545440 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [.], ack 147059, win 1037, options [nop,nop,TS val 4215616240 ecr 1616898691,nop,nop,sack 1 {67091:68519}], length 0
14:03:47.545486 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 92
14:03:53.314140 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215622008 ecr 1616898691], length 0
14:03:53.314221 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:04:09.186135 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [F.], seq 6084, ack 147059, win 1037, options [nop,nop,TS val 4215637880 ecr 1616898691], length 0
14:04:09.186200 IP6 2403:d000:4:11::5:76 > 2404:6800:4008:c15::1b: ICMP6, destination unreachable, unreachable port, 2403:d000:4:11::5:76 tcp port 43922, length 80
14:05:48.336071 IP6 2403:d000:4:11::5:76.43922 > 2404:6800:4008:c15::1b.25: Flags [.], seq 67091:68519, ack 6084, win 501, options [nop,nop,TS val 1617629927 ecr 4215005707], length 1428: SMTP
14:05:48.377654 IP6 2404:6800:4008:c15::1b.25 > 2403:d000:4:11::5:76.43922: Flags [R], seq 322650921, win 0, length 0
