[Mimedefang] check_against_smtp_server() with STARTTLS and AUTH support

[Franz Schwartau]

Hi Dianne, hi list members,

I appreciate md_check_against_smtp_server() supplied by mimedefang.pl
very much. But it lacks two - IMHO - important features: ESMTP AUTH and
STARTTLS.

In 2013 - where is the time gone? - I posted a version of
md_check_against_smtp_server() that supports ESMTP AUTH:

http://www.mail-archive.com/mimedefang@lists.roaringpenguin.com/msg15282.html

Adding support for STARTTLS this way seems to be too extensive. So I
started an alternate implementation of check_against_smtp_server() using
Net::SMTP:

https://github.com/franzs/mimedefang-contrib/tree/master/check_against_smtp_server

It runs on our production servers for a week by now without any problems.

Feel free to use it. If you have any comments please let me know.

	Best regards
		Franz