550 requested action not taken

  1. bhawanisingh

    [RESOLVED] Error : "550 requested action not taken: mailbox unavailable"

    If you are getting the error “550 requested action not taken: mailbox unavailable” while sending the mails then it may be possible that mail recipient is not found. For example you are sending the email on [email protected] but mail services are not able to locate the mail address. We already...
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