On Thu, Aug 11, 2022 at 09:06:28PM +0100, Mike Tubby via Exim-users wrote:
> I have experienced the same... seems to happen one every 2-3 weeks and I
> think it depends on which actual server in Google's cluster you get
> connected to.
>
> Google's implementation of SMTP seems to be very poor at reporting
> actual problems, rather it either accepts delivery (and presumably
> discards it) or hangs like you have experienced.
The evidence from the posted decodeed packet capture so far suggests
otherwise. The problem is at the TCP layer, completely unrelated to
Google's "SMTP implementation", and to first approximation, pending
further more detailed analysis of packet captures, looks like a Linux
TCP bug, more than a Google bug...
--
Viktor.
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