On 07.07.2015 05:21, Alex wrote:
Hi,
We have a system with a few hundred users, many of which forward their
mail off the server to their gmail or yahoo account. Lately I've
started to notice quite a few messages are being tagged by gmail and
delayed being received as unsolicited. I know the KAM rules contain a
marketing rule, and razor helps too, but too many of these marketing
messages are not being tagged.
I'm referring to warnings such as this:
Jul 6 22:54:20 bwipropemail postfix/smtp[25057]: C09F4885EA2BC:
to=<44...@gmail.com>, orig_to=<44...@example.com>,
relay=alt1.gmail-smtp-in.l.google.com[173.194.208.26]:25, delay=38223,
delays=38220/1.3/1/0.22, dsn=4.7.0, status=deferred (host
alt1.gmail-smtp-in.l.google.com[173.194.208.26] said: 421-4.7.0
[66.XXX.XXX.100 15] Our system has detected an unusual rate of
421-4.7.0 unsolicited mail originating from your IP address. To
protect our 421-4.7.0 users from spam, mail sent from your IP address
has been temporarily 421-4.7.0 rate limited. Please visit 421-4.7.0
https://support.google.com/mail/answer/81126 to review our Bulk Email
421 4.7.0 Senders Guidelines. 5si23309629qks.82 - gsmtp (in reply to
end of DATA command))
Here is an example message:
http://pastebin.com/kaD3AQMz
I realize bayes may be a problem on this one, but do you have any
suggestions for blocking these more effectively before they're
forwarded on to gmail?
imo, this is not something SA will consistently fix for you but more of
a policy decision which will probably cause you endless problems.
If you are forced to permit forwarding, you should do SRS on the
forwarding msgs (inkl. SPF/DKIM) so receivers "see" you're not the
original msg source and act accordingly.
I would ban forwarding, period.
Axb
