Hi all,

When some one try to send mails to my exchage server, they are getting the
following undelivered error message. It's not happening always and not to
everyone.

Your message cannot be delivered to the following recipients:

  Recipient address: a**@mydomain.com
  Reason: Remote SMTP server has rejected address
  Diagnostic code: smtp;571
  Remote system: dns;mail.mydomain.com
(TCP|10.23.32.22|45447|216.254.xxx.xxx|25) (SMTP service ready)


sever info;
OS : Windows 2003
EX: Ex 2003 std.
standard receipient policy for all.

any help would be appreciated

Thanks

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