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Security leak in HUB server

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Dear Exchange Admins

We have an exchange environment with 3 CAS+3 HUB+4 mailbox servers.

We have two receive connecters .

One connecter is for exchange users (For authenticated users only) (Client Srvinfhub01) and in this connector only exchange users are allowed to receive email.

Another connecter in which anonymous users have permission to receive email .It is for servers which  will send automated email without authentication. This connector will receive email only from the servers which has listed IPs in receive connecter list.

The problem is that.

Using telnet I send some couples of emails using authenticated connector and email has delivered without authentication.

Kindly share your experience.


Ashraf


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