On 05/05/2016 07:16 PM, Lennart Sorensen wrote:
On Thu, May 05, 2016 at 06:22:12PM -0400, Christopher Browne wrote:
We've had some issues with handling email coming from Yahoo! that seems to relate to some anti-spam mechanisms.
I am aware of colleagues that used to use Yahoo! for their mail that have switched to other mail services as consequence of (seeming relevant) changes in DMARC policies.
A relevant pointer: < http://postgresql.nabble.com/New-email-address-td5874833.html>
Now, what I'd been hearing was *last* year's news. After the dust clouds have settled a bit, what's up these days with "Yahoo vs mailing lists?" Well yahoo pretty much says "Fuck up your mailing list settings or don't allow @yahoo.com users to post to your list anymore": https://yahoomail.tumblr.com/post/82426900353/yahoo-dmarc-policy-change-what...
They want the mailing list to set the From field to be the mailing list rather than the actual sender.
I guess they have decided technical users who are posting on mailing lists don't use @yahoo.com anyhow, so they don't care. Or at least not enough of them do for it to be important.
If as a sending domain owner you set your SPF and DKIM/DMARC settings to stop people from masquerading as your site then you will have side effect of stopping any mail lists that send messages as if they were from the poster. Once upon a time mail was a nice friendly service where people ran open relays and there was no problems. Spammers have incrementally forced mail operators to add tighter and tighter controls to keep their heads above water. It may be that the next mail service to die will be mail lists. I am in the process of clamping down on all messages so that any mail stamped as from a domain that I manage should get rejected by as many sites as possible if the message is not from my server. -- Alvin Starr || voice: (905)513-7688 Netvel Inc. || Cell: (416)806-0133 alvin@netvel.net ||