On Tue, 17 Aug 2021, Steffen Nurpmeso steffen-at-sdaoden.eu |s-nail| wrote:
I will spin up a VM this evening and try again. I cannot remember ever seeing such a problem. You are using 14.9.21?
I've tried several versions, but the tests I just reported were with the 14.9.22 rpm (s-nail-14.9.22-3.el7.x86_64) on Scientific Linux 7 (clone of Centos 7, clone of RHEL 7). To try with the patch you supplied, I compiled from the 14.9.22 tarball on SL 7.
The smtp server responds with ESMTP, but I don't know what program it is running.
The problem is in the authentication, not the message transmission itself. If I set up an ssh tunnel to port 25 on the same server (my kerberos ticket allows me to do that) and then set mta=smtp://localhost:<tunnel port>, mail goes through. My problem with that solution is that the tunnel doesn't last very long and I have to keep reconnecting.
Stephen Isard
