Did Yahoo email policy change?

[Miramonti]

I'm having a problem sending email to yahoo addresses when I use a different SMTP server than the domain of the sending email.

host mta6.am0.yahoodns.net said: 554
5.7.9 Message not accepted for policy reasons. See
http://postmaster.yahoo.com/errors/postmaster-28.html (in reply to end of DATA command)

Anyone else have [yahoo mail] issues?

 

[mrjminer]

Never had the problem myself, but I looked through some of the links from the page.

I'd guess your server isn't sending a DKIM token (or is sending an incorrect one) that yahoo is trying to authenticate to verify the message from your SMTP domain actually has the authority to send e-mails on behalf of your domain. Perhaps look at your outgoing mail headers from your SMTP server and verify they are sending a DKIM token (or DomainKeys, whatever is supposed to be used I didn't go into the reading too far in depth ). Or, maybe an easier way might be to send an e-mail to a domain you know it will get through on (one that doesn't implement DKIM/DMARC) and see what the received headers for the message were

 

[Miramonti]

Never had the problem myself, but I looked through some of the links from the page.

I'd guess your server isn't sending a DKIM token (or is sending an incorrect one) that yahoo is trying to authenticate to verify the message from your SMTP domain actually has the authority to send e-mails on behalf of your domain. Perhaps look at your outgoing mail headers from your SMTP server and verify they are sending a DKIM token (or DomainKeys, whatever is supposed to be used I didn't go into the reading too far in depth ). Or, maybe an easier way might be to send an e-mail to a domain you know it will get through on (one that doesn't implement DKIM/DMARC) and see what the received headers for the message were

Thanks for the feedback, mrjminer. I will test these and see what I find.