[exim] TLS/GnuTLS problem

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Author: Klaus Ethgen
Date:  
To: exim-users
Subject: [exim] TLS/GnuTLS problem
Hello,

I think I have one more "problem" with gnutls.

I run a debian server with exim on it (4.72). That was working fine and
I especially like the way to split config.

However, now I started using nullmailer on dull clients. But when I send
mails from that client, I get the following errors:
TLS error on connection from ... (...) [...] (recv): A TLS packet with unexpected length was received.
TLS error on connection from ... (...) [...] (send): The specified session has been invalidated for some reason.

I would expect that the TLS session is invalidated and, as the client
can authenticate and I do not allow authentication over unsecure line,
the sending of the mail should fail.

But that is not the case. The TLS session goes on, the client
authenticate and the mail is sent. I did double check by using tcpdump
that the message is really encrypted.

So is this just a misleading message from gnutls? Is there any I can do
about this?

A few more details. The nullmailer is run just with a --starttls but
without own certificate. But that should work that way. It works with
other client software too. Just the nullmailer triggers this "problem".

Regards
   Klaus Ethgen
- -- 
Klaus Ethgen                              http://www.ethgen.ch/
pub  4096R/4E20AF1C 2011-05-16   Klaus Ethgen <Klaus@???>
Fingerprint: 85D4 CA42 952C 949B 1753  62B3 79D0 B06F 4E20 AF1C