starla2088's profile

3 Messages


140 Points

Friday, December 1st, 2023 7:33 PM

Gmail authentication

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 b7-20020ab00847000000b007c1aef33bf2si621577uaf.77 - gsmtp


It seems like you've helped a lot of people with this, but I haven't found any instructions on how to fix it myself.  Can you help?

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Brand User

78 Messages


906 Points

3 months ago

Hello Starla2088,


Thanks for your message. The issue was caused by an incorrect SPF record. I have updated the record, and you should be able to send to Gmail again.