Patrick O'Callaghan wrote:
On Tue, 2018-03-27 at 17:27 -0400, Todd Zullinger wrote:
Hi all,
As we've discussed in this thread and others recently, messages from subscribers @yahoo.com do not reach subscribers @gmail.com (among others). This is due to an aggressive policy set by Yahoo which breaks mail sent via the mailing list.
The mitigation enabled should change the From: address of the outgoing mail to the list address. This should only apply to users of @yahoo.com and other domains which set a similar DMARC policy. Subscribers at other domains should see no change to the From: address of mail they send to the list.
I believe that only the email address will be changed, and not the sender's name, but I am not certain of that yet.
I did check the mailman source code and it does leave the user name mostly untouched. So (presuming @example.com has a DMARC 'reject' policy),
From: Some User someuser@example.com
would be changed to
From: Some User via users users@lists.fedoraproject.org
Hopefully this mitigation will work well and provide an overall improvement to the list. If not, we'll revert it.
That seems to be a sensible change. Perhaps one or two yahoo.com users could post here just to check it's working and we gmail.com users can see their messages.
Of course as long as nothing appears we'll have to keep checking HK to see if we're missing something ...
Or you'll notice replies to messages you've not seen. :)
Maybe we'll be lucky and everyone will move off @yahoo.com, giving the infrastructure team a nice present.