2 May
2014
2 May
'14
1:59 p.m.
From: James B. Byrne byrnejb@harte-lyne.ca
The CentOS list uses Mailman (2.1.12) and as another has pointed out, recent changes to DMARC enforcement at Yahoo, AOL, and now apparently Google, causes DKIM signed email forwarded though mailman to fail the authentication checks relating to DKIM. This is either treated as suspicious (as is apparently the case with Google) or rejected outright, as is the case with Yahoo and AOL.
I use yahoo mail for my mailing lists and I "only lost" around 5 of them (disabled
because of bounced messages) out of 22. And, as you guessed, CentOS ml seems unaffected so far.
JD