On November 10, 2018 12:31:49 PM UTC, Neil Johnson neil.johnson@erudicon.com wrote:
TL;DR: In never ending battle against SPAM and phishing attacks, some email providers are now using DMARC, rejecting or marking as SPAM email if the originating mail server doesn't match the authorized ones for the provider's service.
For example:
- Yahoo! is flat out rejecting e-mail from yahoo! mail users if it
comes from non-authorized servers.
- Google is marking e-mail from gmail users as SPAM if it comes from
non-authorized servers.
Unfortunately this breaks mailing list software like mailman (used for this list) which tries to make e-mail from the list appear as if it is coming from the original sender.
The changes that are required to fix the issue change the functionality of the list software in ways users may not like.
I found this out while applying DMARC for my my own domains.
More info can be found at these sites: https://wiki.list.org/DEV/DMARC https://dmarc.org/
Fun.
-Neil
Hi Neil,
That DEV/DMARC link is a bit dated and obsolete.
The DMARC mitigation code available in Mailman (since v2.1.18) is in wide use and working well. At a minimum this list should be automatically munging posts from DMARC enabled domains.
Let me know if you need any help with this. I'm new here, but somewhat of an old-hat in the Mailman world. I'm always glad to help.
73s,
-Jim P.