wiki:yahoo-email-change

Version 2 (modified by Jamie McClelland, 6 years ago) (diff)

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Yahoo breaks mailing list around the Internet

In early April, Yahoo changed their email configuration in an effort to stop spam. This change has caused widespread problems with users throughout the Internet, including May First/People Link Members.

As a result of the changes, email messages sent to our email lists that are from a Yahoo address will bounce when delivered to many providers, including but not limited to gmail and comcast accounts. Once enough bounces are recorded, these subscribers (the gmail and comcast subscribers) will be removed from your lists.

What should you do? If you are sending messages to our email list from a Yahoo account, please stop immediately. If you are a May First/People Link, please open a support ticket to ask for help in setting up a May First/People Link email address (https://support.mayfirst.org/newticket). If you are not a May First/People Link member, please join. Either way: stop using Yahoo.

If you manage an email list, please email your list warning them about this problem and asking that subscribers with Yahoo address stop sending messages to the list.

May First/People Link is currently reviewing our options to address this problem.

Technical Details

Yahoo has published information to all mail providers telling them to reject any message that claims to be from Yahoo that does not properly prove it was sent from a Yahoo server. When you send a message to an email list, the email list will resend that message to all subscribers to that list. As a result, the message is not being sent from a Yahoo server, it is being sent from the server running the mailing list. When accepting email, servers are not able to verify that the message was coming from Yahoo, so they reject the message.

For more information, please see:

http://www.spamresource.com/2014/04/up-in-arms-about-yahoos-dmarc-policy.html