Locking Down Exchange Server  SMTP Traffic

Posted on 2011-05-07
Last Modified: 2012-05-11
I am using McAfee Total Protection advance as a hosted service and they advised as below, How do I do this ?

In order to prevent senders from bypassing filtering by connecting directly to mail servers, it is recommended that the mail servers be locked down so that they only accept SMTP traffic from the filtering service mail servers. For your reference, the IP subnets currently hosting filtering service mail servers are listed below.( And then theyn provide a range of IP Addresses)
Question by:BhanaD2
    LVL 6

    Expert Comment

    You can block all outgoing SMTP connexion except does going to the filtring software in your firewall .
    i guess you have a firewall  at your infrastructur ,you can setup a rule to deny SMTP from any source to any destination except from the Macafee server .

    none will be able to establish direct connecxion to XXXXXXXX via smtp .

    Author Comment

    How do yuo Lock down Microsoft Exchange for SMTP Incoming Traffic ?
    LVL 26

    Accepted Solution

    Specifying which version of exchange server you use would help.
    You can do it via SMTP receive connector /exchange 2007/2010) or via SMTP virtual server (exchange 2003).
    LVL 26

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