[Mailman-Developers] mailing list to work with ADSP and DMARC

[Franck Martin]

I did a branch on the 2.1 series to test rewriting the From: header to be able to make emails to comply with DMARC and ADSP 

You can find the branch here: 

https://code.launchpad.net/~mlm-author/mailman/2.1-author 

and the diff with mailman main branch here: 
http://bazaar.launchpad.net/~mlm-author/mailman/2.1-author/revision/1340?start_revid=1340&remember=1338&compare_revid=1338 

I have also a test mailing list running at: 
http://lists.peachymango.org/mailman/listinfo/mlm-auth 

The best to see how it works is to subscribe, send an email, and see how the email is distributed. I guess you need to receive an email to see that... I'll reply... 

Several ways to solve this problem were explored with mailman: 
http://wiki.list.org/display/DEV/DKIM 

I took a 7th option which is to rewrite the From: without using the + and put the information about the sender in the Reply-To: 

This may not be optimum but it works. 

Overall this solution is one out of 3 ways to get mailing lists running with DMARC (see DMARC FAQ) 
1) don't break DKIM 
2) use AOR 
3) rewrite the from 

There is another one which is to whitelist emails coming from mailing lists.... 

Also note that while I'm involved in the DMARC group, I do this code as a personal project. 

Now send comments, and be nice with me :P