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EXCHANGE SERVER 5.5 : Plugging an IMC lo

By jean ·
Therefore this is a LOOPHOLE that our users use to send UNATHORISED INTERNET mail, now since they don't have OFFICIAL Internet addresses X.400 is used as the ADDRESSING mechanism e.g. 'IMCEAEX-_O=WIDGET_OU=ROMAN_CN=RECIPIENTS_CN=RONELL@widget.com'

This is the address that the recipient of this message that is outside our organisation receives and all they have to do is to reply to this message OR copy this ADDRESS into their address book and then they can send the UNATHORISED user INTERNET mail. So what I'm trying to do is to prevent UNATHORISED users in our site from using this LOOPHOLE. I've managed to prevent them from sending INTERNET mail now by asking the network administrator of the other site to REJECT all requests from people in our site to use the IMC connector but I can't find a way of preventing EXTERNAL users from sending these users mail by using the X.400 addressing.

Does anyone know how I can prevent mail from entering our system when outside users use the X.400 addressing mech

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EXCHANGE SERVER 5.5 : Plugging an IMC lo

by McKayTech In reply to EXCHANGE SERVER 5.5 : Plu ...

It sounds like you're caught in a game of cat and mouse with your users. If there is really a business need to prevent your users from having access to Internet e-mail, you probably need to sit down with the Unix system administrator and figure outhow to reject e-mail destined for your unauthorized users at their end. I don't know any way to make Exchange reject X.400 connections on a user-by-user basis.

As an alternate approach, you could implement third-party e-mail monitoring software (e.g. Mail Essentials) and just let everyone know that their e-mail access is being monitored and there will be consequences for violations of policy.

paul

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EXCHANGE SERVER 5.5 : Plugging an IMC lo

by jean In reply to EXCHANGE SERVER 5.5 : Plu ...

This wasn't the answer that I was hoping for but one that I suspected would be my last resort i.e. implementing restrictions on the UNIX box. Thanks alot for your help I really appreciate it.

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EXCHANGE SERVER 5.5 : Plugging an IMC lo

by jean In reply to EXCHANGE SERVER 5.5 : Plu ...
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