Mail system status: some problems solved (and some not)

Hi,

Introduction of ARC signing and a DMARC DNS record seem to have satisfied
Google's bulk sender requirements again: the domain reputation has gone
back to High (from Medium since mid-June). Also, mails to GMail addresses
from our mailing lists are not being blocked by GMail anymore.

So far, so good. What's not working yet, is the mail forwarding service
where users have an @common-lisp.net address where the forward address is
hosted by Google. These mails are not being ARC signed; while Exim has an
(experimental) feature to apply ARC signing to mails, the maintainer(s) at
Debian will not consider enabling it (
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1058808).
There are mail-filters (milters) in the Debian ecosystem which *will* allow
ARC signing for this mail flow, but Exim doesn't support milters under the
pretense that it is sufficiently extensible not to need that. Which is
probably true since they embed a Perl interpreter (why?!). On the other
hand, since milters are a generally accepted extension mechanism for mail
servers, the combination of positions taken by the Exim developers and the
Debian Exim packagers, is rather unfortunately resulting in the fact that
we can't forward mail to Google...

I'm open to ideas or options that I may have missed while doing my research
for solutions.


Regards,

-- 
Bye,

Erik.

http://efficito.com -- Hosted accounting and ERP.
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