Bug#962847: exim4: takes forever to send a mail after sleeping

[Marc Haber]

On Mon, Jun 15, 2020 at 02:34:42AM +0200, Rémi Letot wrote:
> Since upgrading to 4.94 (4.94-1 and 4.94-2 display the problem), I have 
> noticed delays when trying to send email after the laptop has been sleeping. 
> 
> My mail client (emacs) simply gets stuck until I cancel the message, or 
> wait long enough.
> 
> At first I thought that it simply got stuck, but while testing i noticed 
> that the delay is exactly the time that the laptop has been sleeping. 
> 
> Here the laptop has been asleep 1 minute and 11 seconds:
> 2020-06-15 01:17:44 1jkbsm-000Stl-SK <= remi at lybrafox.be H=(sphax) [::1] P=esmtps X=TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256 CV=no S=664 id=87y2ops0do.fsf at sphax
> 2020-06-15 01:18:55 1jkbsm-000Stl-SK => remi at lybrafox.be R=smarthost T=remote_smtp_smarthost H=mail2.lybrafox.be [37.59.240.190] X=TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_256_GCM:256 CV=no DN="CN=mail2.lybrafox.be" A=plain C="250 2.0.0 Ok: queued as 394FB419A4"
> 2020-06-15 01:18:55 1jkbsm-000Stl-SK Completed
> 
> And here it has been asleep exactly 4 minutes 2 seconds:
> 
> 2020-06-15 01:51:07 1jkcP5-000V8E-MS <= remi at lybrafox.be H=(sphax) [::1] P=esmtps X=TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256 CV=no S=664 id=875zbtqk9i.fsf at sphax
> 2020-06-15 01:55:09 1jkcP5-000V8E-MS => remi at lybrafox.be R=smarthost T=remote_smtp_smarthost H=mail2.lybrafox.be [37.59.240.190] X=TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_256_GCM:256 CV=no DN="CN=mail2.lybrafox.be" A=plain C="250 2.0.0 Ok: queued as 8E27141DEE"
> 2020-06-15 01:55:09 1jkcP5-000V8E-MS Completed
> 
> I didn't test for longer delays, but when I leave the laptop asleep for 
> the night, my mail client just stays stuck.

Logs of the fault please, or it didn't happen. Which system is the one
we're seeing the exim logs from? Where does your mail client run?


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