Re: [Mailman-Users] list mail increasingly flagged as spam

[Mark Sapiro]

On 12/19/2016 04:52 AM, Glen Page wrote:
> I have recently begun to see (and get complaints from some of my users) our 
> list messages being flagged on many users end as spam messages. Wondering if 
> there is anything that i can do on our end to decrease the likelyhood of our 
> messages being flagged as spam. If it would help, I can send some header info 
> from some of our messages.


See the article at 

Even before doing any of the things there, do all of the following.

1) Ensure your sending server has full circle DNS
. I.e. the
domain the server identifies itself as in HELO/EHLO has an A record with
the IP address of the server and rDNS lookup of that address points back
to the domain.

2) Publish SPF for the list domain authorizing the sending server.

3) DKIM sign outgoing list mail with the list domain.

These are not guarantees but they are all things that if not done make
your mail look less legitimate to at least some recipients.

Also if you are not applying DMARC mitigations to your list mail, this
can be a problem, particularly is the "spam" is mail sent From: users in
domains publishing DMARC p=quarantine. See
.

-- 
Mark Sapiro The highway is for gamblers,
San Francisco Bay Area, Californiabetter use your sense - B. Dylan
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Re: [Mailman-Users] list mail increasingly flagged as spam

[Lindsay Haisley]

On Mon, 2016-12-19 at 07:52 -0500, Glen Page wrote:
> I have recently begun to see (and get complaints from some of my
> users) our list messages being flagged on many users end as spam
> messages. Wondering if there is anything that i can do on our end to
> decrease the likelyhood of our messages being flagged as spam. If it
> would help, I can send some header info from some of our messages.

I'm not a Mailman maintainer, but it might be helpful if you could post
any information that would help narrow down the problem. Specifically,
are most or all of the users who have this problem using a particular
mail provider such as Gmail, or some other service? Have any of these
users posted any information to you regarding the reason their mail
service has improperly flagged these list posts?

-- 
Lindsay Haisley   | "Everything works if you let it"
FMP Computer Services |
512-259-1190  |  --- The Roadie
http://www.fmp.com|

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