[Mailman-Users] Question about rejection messages.

[Larry Finch]

On Jul 1, 2014, at 11:42 AM, Barry S. Finkel <bsfinkel at att.net> wrote:

> On 7/1/2014 6:50 AM, Robert Heller wrote:
>> I am the site admin of a server that hosts a bunch of Mailman lists and on the
>> 1st of the month Mailman sends out its monthly reminder messages.  Some of
>> these messages are bouncing.  Some are *obviously* for people who have changed
>> E-Mail providers (the bunces say 'User Unknown' or 'Mailbox full').  But some
>> have 'odd' rejection reasons and I wonder what it really going on.
>> 
>> Comcast is bouncing with the message:
>>     reason: 554 Transaction Failed Spam Message not queued.
>> 
>> Is this Comcast's way of 'hiding' the fact that the E-Mail address is no
>> longer valid? That is, does Comcast consider E-Mail to unknown users spam?
>> 
>> 
> 

Comcast* will reject all list mail from a Yahoo or AOL member post based on those ISP’s DMARC p=reject policy. In other words, they honor the p=reject. Could this be your issue?

best regards,
Larry

*So will many other ISPs: SBC Global, AT&T, Rogers, Earthlink, etc.

--
Larry Finch
finches at portadmiral.org