[Mailman-Users] (postfix &) Results of testing posts to yahoogroups from AOL

[Peter Shute]

Cedric Knight wrote:

> On 09/05/14 22:50, Mark Sapiro wrote:
> > I finally got around to testing this.
> 
> Note that the situation changed the day before you did the 
> test.  There is an announcement dated 8 May here:
> <http://yahoogroups.tumblr.com/post/85163779041/dmarc-related-
> changes-in-yahoo-groups>
> "Following the recent changes in Yahoo DMARC policy to 
> protect users from email spam, we've made changes to how 
> Yahoo Groups sends mails to members' inboxes. ... With these 
> changes we are addressing deliverability issues due to DMARC 
> adoption by mail service providers."

I can confirm that there's been a change. On a yahoo group I'm a member of, Outlook used to say the group messages were from the list address on behalf of the sender's address. Now they just say they're from the list address, although the original sender is listed in the message list. This happened between 9/5/14 and 12/5/14.

I haven't tried to check what headers they've used to confuse Outlook like this.

This group has always been configured so that Reply and Reply All go to the list address, but it was possible to construct a private reply manually by copying the sender's address from the top of the quoted headers. You can't do that anymore in Outlook without delving into the original message's headers.

Peter Shute