Domain name not on certificate

[W0lfgang]

I know this is old but I'm having a problem sending emails via my sky account from another domain email address. It's worked until recently but now sent emails are being rejected by the yahoo mailer-daemon. I found this thread but that ability to set other sender addresses does not appear to exist any more. Can you tell me where it is now if it does still exist? Thanks.

[jayach]

@W0lfgang 

Yes it does still exist, where I showed previously.

https://helpforum.sky.com/t5/Email/Domain-name-not-on-certificate/m-p/4670808#M100356

You will find it under Settings - More settings - Mailboxes. Use a desktop browser, not a mobile device.

I've just added another address and it does still appear to work, although I had to try it a couple of times to get it to verify.

[W0lfgang]

Thanks for the quick reply. Desktop browser required, of course. However, the email adddress I'm having a problem with is there in the list of send only addresses and has been working for years until very recently. Yahoo must have changed something. Now when sending with that email address emails are rejected with

MAILER DAEMON at yahoo.com www.yahoo.com

From:mailer daemon at yahoo.com

To:send only email address

(exact addresses bodged as it wouldn't let me post the message otherwise)

Sorry, we were unable to deliver your message to the following address.

<another email address>:

550: 5.7.26 Unauthenticated email from xxx.org.uk is not accepted due to

5.7.26 domain's DMARC policy. Please contact the administrator of

5.7.26 xxx.org.uk domain if this was a legitimate mail. To learn about

5.7.26 the DMARC initiative, go to

5.7.26  https://support.google.com/mail/?p=DmarcRejection ffacd0b85a97d-432bd617915si451262f8f.374 - gsmtp

I've checked and xxx.org.uk does have a valid DMARC policy.

I'll probably start a new thread.

[jayach]

@W0lfgang 

All the large email organisations (Microsoft(Outlook), Gmail and Yahoo) have been tightening up their anti-spam measures recently, and problems such as this are cropping up regularly. The organisations seem to correct the errors eventually but it can take a while.

Out of interest, what domain are your failing emails coming from?

Possibly re-adding the forward rule would get it working again?