> RemoteDelivery: Permanent exception delivering mail
> (Mail1097587130804-1-to-tusc.com:
> javax.mail.MessagingException: 501 5.5.4 Invalid Address

The server is rejecting MAIL FROM: <> in violation of the RFCs (see
http://www.rfc-ignorant.org/policy-dsn.php), as demonstrated by:

  220 tuscil_ex1 Sunbelt Software SMTP MAIL Service, Version: 1.0 ready at
10/14/004 10:17:16 -05:00
  HELO ...
  250 tuscil_ex1 Hello [24.88.22.141]
  MAIL FROM: <>
  501 5.5.4 Invalid Address

Nothing to do but submit them to the RFC-Ignorant.org block list.

        --- Noel


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