doug7705's profile

4 Messages


292 Points

Wednesday, October 18th, 2023 4:49 PM

cannot send email to gmail accounts

I cannot send email to gmail accounts.  I keep getting a mail system delivery failure message followed by:

host []

    SMTP error from remote mail server after pipelined 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

    550-5.7.26 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 y6-20020a25ad06000000b00d78336e6470si3277405ybi.102 - gsmtp

Please advise how to fix this problem.  

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Brand User

10.4K Messages


139.7K Points

4 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.