Bug#343085: exim4: Exim SMTP_AUTH hangs since today...

[Florian Weimer]

* Marc Haber:

>> On my server the entropy ist only "168" could this be the cause of a GNUTLS problem?
>
> Yes. exim will wait (and block) until there is enough entropy
> available to initialize the TLS session.

According to my tests, it doesn't.  After some discussion with the GNU
TLS developers, I think it does the right thing and reads from
/dev/urandom only.

I fear that we need the output of

  strace -o /some/file -T -f exim4 -qf -v

to debug this further (run this command as root, and try to reproduce
the blocking behavior).  The resulting file may contain private
information such as passwords and email addresses; you might want to
send it directly to Marc or me, and not the BTS.