Hello,
On Thu, 17 Feb 2022 10:00:12 +0100 Kai Bojens via Exim-users wrote:
> Am 16.02.22 um 08:17 schrieb Christian Balzer via Exim-users:
>
> > On the MSAs we added IPv6 and noticed this oddity when delivering large
> > mails (over 128KB it seems) to google/gmail via v6:
>
> (…)
>
> I can confirm this and have also seen this for IPv4 this morning:
>
Thanks for that, my sanity has been restored.
For the record, I have/had very different FW rules for v4, which explains
why this did not show on there as well.
> H=gmail-smtp-in.l.google.com [2a00:1450:400c:c0b::1a]: SMTP timeout
> after sending data block (266346 bytes written): Connection timed out
>
> H=gmail-smtp-in.l.google.com [142.250.147.26]: SMTP timeout after
> sending data block (266133 bytes written): Connection timed out
>
> This happens on a Debian Bullseye with Exim 4.94.2, nftables and
> IPv4&IPv6. Other systems with Ubuntu 18.04, Exim 4.90_1, and IPv4 only
> and iptables are not affected. As of now I have no explanation on our
> side for this behavior.
>
Can you also confirm that small mails, sessions shorter than 2 seconds
have no problem?
Christian
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--
Christian Balzer Network/Systems Engineer
chibi@??? Rakuten Communications
