Stanis??aw Findeisen:
> Hi
>
> I am getting such errors in the log:
>
> Feb 24 10:03:21 * postfix/smtp[9203]: C2EFF1823C1: lost connection with
> ASPMX.L.GOOGLE.COM[74.125.43.27] while sending end of data -- message
> may be sent more than once
>
> This happens many times a day with various servers --- not just
> google.com. Otherwise everything works fine.
>
> What do you think the problem is?
Don't speculate, measure. Look at packet traces with tcpdump,
and see at what point the connection breaks.
- Does the problem only happen with connections that use TCP window
scaling? If so, you have a borked firewall that mis-implements TCP.
- Does the problem go away with small messages? If so, you have a
broken IP path MTU problem.
And so on, there are many reasons why TCP can break.
Wietse
> The puzzling thing is also this one:
>
> $ host 74.125.43.27
> 27.43.125.74.in-addr.arpa domain name pointer bw-in-f27.1e100.net.
>
> ??
>
> --
> Eisenbits - proven software solutions: http://www.eisenbits.com/
> OpenPGP: DFD9 0146 3794 9CF6 17EA D63F DBF5 8AA8 3B31 FE8A
>
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