[Users] Sending mail hangs when using PGP MIME

[Paul]

On Fri, 13 Oct 2017 14:11:18 +0000
Mark Raynsford <list+org.claws-mail at io7m.com> wrote: 

> Nothing useful in the Network log. Here's the output of the --debug
> option when opening Claws, attempting to send a message, and waiting
> for it to time out:
> 
>   http://ataxia.io7m.com/2017/10/13/claws-debug.txt

That seems to look fine, we see Claws doing

[13:38:43] SMTP> . (EOM)

I read a thread with what sounds like the same problem. Here the OP
says it was down to mismatched MTU settings on router and network
card. It seems a long shot but, hey, here it is:

https://www.howtoforge.com/community/threads/postfix-timeout-after-data-from-some-emails.39635/

with regards

Paul