[exim] "The TLS connection was non-properly terminated" afte…

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Author: Olaf Hopp (SCC) via Exim-users
Date:  
To: exim-users
Subject: [exim] "The TLS connection was non-properly terminated" after upgrade of Debian from 11 to 12
Dear collegues,

after upgrading my Debian 11 (Bullseye) with exim 4.94
to Debian 12 (Bookworm) with exim 4.96 I see for every mail going from my MX host to the internal
Exchange server the message "The TLS connection was non-properly terminated"
However the mail is delivered fine.
There had been no change on the Exchange side and also no change in the Exim config of my MX host
The log line are as follows:

2023-06-28 11:04:14 1qER5y-002VJI-0r <= test@??? U=root P=local S=415 from <test@???> for test@???
2023-06-28 11:04:14 1qER5y-002VJI-0r H=smtp.example.com [xxxxx:yyyy:9:f612::106] TLS error on connection (recv): The TLS connection was non-properly terminated.
2023-06-28 11:04:14 1qER5y-002VJI-0r => test@??? R=ldap_redirect T=remote_smtp H=smtp.example.com [xxxx:yyyy:9:f612::106] X=TLS1.2:ECDHE_SECP384R1__RSA_SHA256__AES_256_GCM:256 CV=yes K C="250 2.6.0 <E1qER5y-002VJI-0r@???> [InternalId=131013682397521, Hostname=smtp.example.com] 1551 bytes in 0.202, 7,476 KB/sec Queued mail for delivery"
2023-06-28 11:04:14 1qER5y-002VJI-0r Completed

I did a
         exim -d+all -bm -f test@??? -t <  test.eml
and put the output from the STARTTLS command unter
https://pastebin.com/mLjjXaFJ

Debian 11 uses 3.7.1-5 for gnutls (exim under Debian is linked against gnutls)
Debian 12 uses 3.7.9-2

Can I simply ignore this message ? Can I avoid this message ?

Regards, Olaf


-- 
Karlsruher Institut für Technologie (KIT)
Steinbuch Centre for Computing (SCC)

Dipl.-Geophys. Olaf Hopp

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76131 Karlsruhe

Telefon: +49 721 608-48009
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