Why "550 Message rejected due to senders DMARC policy" even if message properly authenticated on Yahoo SMTP server?
Why "550 Message rejected due to senders DMARC policy" even if message properly authenticated on Yahoo SMTP server? … Why "550 Message rejected due to senders DMARC policy" even if message properly authenticated on Yahoo SMTP server?
Thanks for your answer.
So this means that (the millions of) individuals like me (without their own domain name / email address) who use Yahoo mail can no longer reliably send emails via the tha Yahoo SMTP servers even if we are properly authenticated by the server at the time of sending?
This behavior you've noticed is related to Yahoo's DMARC policy which was put in place to combat the practice of "spoofing" email addresses. That's where pretends they send an email from your address and our server, but it actually is coming from somewhere else entirely, and as you can imagine it's a major security issue. This isn't related to the actual sending of the email through the SMTP server.
For more on what DMARC is and how you can avoid having legitimate emails blocked by it, please have a look at the Yahoo Help article "Email service providers can't send to / from Yahoo addresses", available at:
https://help.yahoo.com/kb/mail/SLN24016.html
I hope you find this helpful!
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