DMARC Errors e.mails bouncing BTinternet

25 0 5

Hi there, i am with BTinternet, i have a BT e.mail address which is linked to my shopify account.

However any notifications that should be going to customers or e.mails that i try to send though shopify are bouncing back to me.  For example :-

This is the mail system at host

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system
<*******>: host[] said:
    550-5.7.1 Unauthenticated email from is not accepted due to
    550-5.7.1 domain's DMARC policy. Please contact the administrator of
    550-5.7.1 domain if this was a legitimate mail. Please visit
    550-5.7.1 to learn about
    the 550 5.7.1 DMARC initiative. v68si5941631qki.408 - gsmtp (in reply to
    end of DATA command)

So customers are not getting e.mails or notifications.  I can send an e.mail directly from my windows mail, using my bt address with no problems at all.  It is just via Shopify.

This is also a new problem i seem to be having this week, i have been using this bt e.mail with my shopify account for the last 3 years or so and no problems.

Any help would be much appreciated

Many thanks :)

New Member
1 0 0

I got the same issue..

It just recently began...

A solution would be great...