mark3607's profile

7 Messages


260 Points

Friday, November 17th, 2023 11:35 PM

Unable to send email to Gmail address - Why?

This is what I get back from Google....

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

    host []

    SMTP error from remote mail server after end of data:

    550-5.7.26 This mail has been blocked because the sender is unauthenticated.

    550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM.


    550-5.7.26  Authentication results:

    550-5.7.26  DKIM = did not pass

    550-5.7.26  SPF [] with ip:

    [] = did not pass


    550-5.7.26  To mitigate this issue, please visit Gmail's authentication guide

    550-5.7.26 for instructions on setting up authentication:

    550 5.7.26 e12-20020a05622a110c00b0041fe47da9desi2302693qty.316 - gsmtp

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Brand User

10.4K Messages


139.9K Points

3 months ago


Can you go ahead and try once more? I have updated the TXT SPF record for your domain which should allow it to begin working properly.