> from  external address connection and from a external user I send to
> server2...Server2 send a mail to server1 thath translate the address
> to  <mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED] and
> then sent it.

If  your  mail  servers each must run as backup to each other for some
reason,  you  will  not  be  able  to  avoid  this issue/vulnerability
(without Declude or other post-processor).

If  you  simply  want  to  get  mail from your backup MX to go to your
primary,  ONLY  the backup needs to have the primary in its "Relay for
Addresses"  list,  and  NOT  vice  versa,  and you will then avoid the
issue.

-Sandy


------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
e-mail: [EMAIL PROTECTED]
------------------------------------


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