Hello,
After upgrading one of our servers from exim 4.12 (+exiscan patch
revision 26) to exim 4.20 (+exiscan-acl), I noticed that recipients
having to be sent through remote_smtp were stuck, and even worse that I
was actually DoSsing my dns resolver (and thus all other mails were also
blocked).
I rolled back on exim-4.12 and ran the exim-4.20 with -d+all and saw the
following:
[...]
16:25:55 1321 domain = physicman.net
16:25:55 1321 errors_to=NULL
16:25:55 1321 domain_data=NULL localpart_data=NULL
16:25:55 1321 routed by dnslookup router
16:25:55 1321 envelope to: cb@???
16:25:55 1321 transport: remote_smtp
16:25:55 1321 host mail.physicman.net [2001:6f8:204::1] MX=10
16:25:55 1321 host mail.physicman.net [213.193.144.99] MX=10
16:25:55 1321 ---0 Get 135187928 40 host.c 128
16:25:55 1321 ---0 Get 135187968 32 string.c 349
16:25:55 1321 ---0 Get 135188000 40 host.c 128
16:25:55 1321 ---0 Get 135188040 32 string.c 349
16:25:55 1321 ---0 Get 135188072 40 host.c 128
16:25:55 1321 ---0 Get 135188112 32 string.c 349
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net (A6) gave NO_DATA
16:25:55 1321 returning DNS_NODATA
16:25:55 1321 ---1 Get 135179296 296 dns.c 200
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net (AAAA) succeeded
16:25:55 1321 ---0 Get 135188144 64 dns.c 711
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net (A) succeeded
16:25:55 1321 ---0 Get 135188208 32 dns.c 694
16:25:55 1321 ---0 Get 135188240 40 host.c 1630
16:25:55 1321 fully qualified name = smtp.mail.be.easynet.net
16:25:55 1321 smtp.mail.be.easynet.net 2001:6f8:200:1::1:75 mx=-1 sort=-840
16:25:55 1321 smtp.mail.be.easynet.net 212.100.160.77 mx=-1 sort=-94
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net-A6: using cached value DNS_NODATA
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net (AAAA) succeeded
16:25:55 1321 ---0 Get 135188280 64 dns.c 711
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net (A) succeeded
16:25:55 1321 ---0 Get 135188344 32 dns.c 694
16:25:55 1321 ---0 Get 135188376 40 host.c 1630
16:25:55 1321 fully qualified name = smtp.mail.be.easynet.net
16:25:55 1321 smtp.mail.be.easynet.net 2001:6f8:200:1::1:75 mx=-1 sort=-673
16:25:55 1321 smtp.mail.be.easynet.net 212.100.160.77 mx=-1 sort=-54
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net-A6: using cached value DNS_NODATA
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net (AAAA) succeeded
16:25:55 1321 ---0 Get 135188416 64 dns.c 711
16:25:55 1321 DNS lookup of smtp.mail.be.easynet.net (A) succeeded
16:25:55 1321 ---0 Get 135188480 32 dns.c 694
16:25:55 1321 ---0 Get 135188512 40 host.c 1630
16:25:55 1321 fully qualified name = smtp.mail.be.easynet.net
16:25:55 1321 smtp.mail.be.easynet.net 2001:6f8:200:1::1:75 mx=-1 sort=-507
and so on until I stop the process...
(OS=Debian GNU/Linux 3.0, kernel 2.4.19-xfs SMP in case it could matter)
My remote_smtp transport looks like:
remote_smtp:
driver = smtp
hosts = smtp.mail.be.easynet.net : smtp2.mail.be.easynet.net : smtp3.mail.be.easynet.net
hosts_override
interface = 212.100.160.69 : 2001::6f8::200::1::::1::69
Any idea what could cause this?
I haven't had any problems with exim up to 4.12 but remember having
some issues with 4.14 (though I didn't had time to investigate the issue).
Kind regards,
Chris
--
Christopher Bodenstein - christopher.bodenstein@???
Systems Administrator - Easynet Belgium
Great acts are made up of small deeds.
-- Lao Tsu
