On 2023-06-03, Jeremy Harris via Exim-users <exim-users@???> wrote:
> On 03/06/2023 21:29, Julian Bradfield via Exim-users wrote:
>> The delay on each recipient is triggered, but then cancelled because
>> exim's smtp_out connection has been shut down.
>
> Thanks - that's the item of info I was missing and
> hadn't realised.
>
> Dumping the previously-received input once we've
> seen the channel close sounds feasible (I'm unsure
> if anything should be specifically logged if we did that)
> and would cut down on log noise for your specific case.
> I don't think standards say anything about the situation,
> but it comes into the realm of self-defence vs. bad actors
> IMHO.
It seems to be ok to discard emails if the sender doesn't wait
for the "250 OK"; Exim has been doing that for decades.
Dropping the input if the output is unwritable seems like an
efficient shortcut to the same result.
--
Jasen.
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