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SMTP Error 553


Requested action not taken: mailbox name not allowed (e.g., mailbox syntax incorrect)

What does this mean?

The receiving mail server was not able to verify the email address.

How to fix SMTP Error 553

Check to make sure all email addresses you are sending to ('TO:', 'CC:', 'BCC:') are correct.

Similar SMTP Errors

email/troubleshooting/error-numbers/553.txt · Last modified: 2015/02/04 14:48 by dlevey