[Mailman-Users] Mailman not showing sender's name for DMARC domain policy=reject

Gordon Dickens gordon at dickens.com
Sat Jun 28 00:11:34 CEST 2014

Hi Mark,

Thanks for the prompt reply!  The problem was my settings in my 
Thunderbird mail client and NOT mailman.  So, you can mark this as solved!

As you suggested, I checked the From: field in the message source and it 
was including the sender's "name via" as it should.  I then checked it 
with my webmail clients, Squirrelmail and Horde, which also properly 
displayed the sender's name.  Then, I discovered a setting in 
Thunderbird which caused my problem at: Edit > Preferences > Advanced > 
"Show only display name for people in my address book" which was 
checked.  When I unchecked this then the sender's name started showing 
up properly in Thunderbird too.  The problem was caused by my having 
that specific mailing list address in my Thunderbird address book 
whereas all of my other mailing lists are not in my address book. This 
may help y'all in the future for Thunderbird users since having that 
preference checked is the default Thunderbird setting and will prevent 
the sender's name from appearing in the From: header for mailing lists 
that are in the Thunderbird address book.

Again, thanks for your reply.  Your suggestion sent me directly to the 
cause of the problem.


On 06/27/2014 05:29 PM, Mark Sapiro wrote:
> On 06/27/2014 11:22 AM, Gordon Dickens wrote:
>> Hello,
>> I am runningseveral mailing lists with mailman version 2.1.18-1. Oneof
>> my mailing lists does not ever show the sender's name in the From:
>> headerfor DMARC domain policy=reject while the rest of my lists do show
>> the sender's name in the From: header. I have compared the individual
>> list settings and cannot find anything different.  The list settings for
>> the list that isn't showing the sender's name are as follows_:
>> _General Options:
>>      from_is_list = No
>>      anonymous_list = No
>>      first_strip_reply_to = No
>>      reply_goes_to_list = "This list"
>> Privacy options > Sender filters:
>>      dmarc_moderation_action = Munge From
>>      dmarc_quarantine_moderation_action = Yes
>> My understanding is that one of the following should be displayed for a
>> DMARC domainpolicy=reject:
>> The author's display name fromtheir From: header
>>       or;
>> If none and from a list member, the members real name from the
>> membership list
>>       or;
>> If none, at least the local part of the emailaddress.
> This understanding is correct.
>> Does anybody have any idea what setting that I need to change to fix this?
> It should work with the settings you have.
> If you look at the raw message source of one of these messages from the
> list, what does the From: look like?  Is it
> From: via LISTNAME<listname at list.domain>
> with only a single space between 'From:' and 'via' or something else?
> Also, what is in the Reply-To: header in addition to the list posting
> address?
> There is a bug in this area. See
> <https://bugs.launchpad.net/mailman/+bug/1318025>. If these posts are
> all from a single user, it could be due to a missing or unparseable
> From: header in the incoming mail.

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