[NTLK] [ADMIN] Recent issues with NTLK bounce notifications

Grant Hutchinson grant at splorp.com
Sat Apr 13 19:20:09 EDT 2019

> On Apr 13, 2019, at 3:16 PM, B <kosmicdollop at saber.net> wrote:
> Thank you, list Dad, and for all your wonderful dedicated service!

And again, thank you for your patience while we get this figured out.

> On Apr 13, 2019, at 3:51 PM, Andrei Chichak <newton at chichak.ca> wrote:
> I figured that my hosting people in Toronto screwed up again and wondered how DMARC managed to get the notification through.
> That lead me down the path of “this has to be spam, logically this can’t happen”. But everything in the message headers looked legit.

Yeah, the headers were fine all along. What changed seems to be the way that certain mail servers accept the "From" address.

The setting change I made replaces the poster's address in the From: header (eg: somebody at aol.com) with the mailing list's posting address (newtontalk at newtontalk.net) and adds the poster's address to the Reply-To: header.

This "header munge" should only take place when someone posts to the list from a domain that has a DMARC reject or quarantine policy in place, such as Yahoo, AOL, or the like.

Fingers crossed.


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