mailer-demon
Mailer demons from yahoo where useless/vague policy violation that helped 0 and frustrated 10... Pasted below is an example of a helpful mailer demon from gmail regarding dmarc... I had to join gmail to figure out what issue was on my server. THIS IS A GOOD EXAMPLE: Reason: There was an error while attempting to deliver your message with [Subject: "test 2 c 2 y"] to *************@gmail.com. MTA p3plsmtps2ded02.prod.phx3.secureserver.net received this response from the destination host IP - 74.125.197.27 - 550 , 550-5.7.1 Unauthenticated email from cyberoceans.com is not accepted due to
550-5.7.1 domain's DMARC policy. Please contact the administrator of
550-5.7.1 cyberoceans.com domain if this was a legitimate mail. Please visit
550-5.7.1 https://support.google.com/mail/answer/2451690 to learn about the
550 5.7.1 DMARC initiative. u125si13119183pfb.112 - gsmtp
Bryant Sharp
shared this idea
Please refer to this article to see why you have received this message: https://help.yahoo.com/kb/SLN24050.html
For further assistance, go to postmaster.yahoo.com