501 5.7.1 Permission denied

SMTP Error Codes

You are not authorized to send. Result of "Reject if originator's IP has no rDNS" or "Reject if SMTP AUTH is different from sender". Check the authentication in email client.

  • Be sure the options are NOT checked in administration console, or:
  • Put the local IP range and your e-mail client IP in the "Relaying from" box, or:
  • Create a Bypass for this IP/host.

Applies To

SMTP Error Codes

See Also