Exemptions from Attachment Filter on Edge Transport

Posted on 2009-04-21
Last Modified: 2012-05-06

Does anyone know if it is possible to exempt recipients from any of the Exchange Edge Transport anti-spam rules?  Specifically, the Attachment Filter rule?

We have a couple of internal system mailboxes which need to be able to receive .exe and other attachments from Internet sources.  However there seems to be no way of allowing this, short of disabling the Attachment Filter rule entirely.  I'd rather not do that, but as far as I can tell, this is the only way.  I know you can exempt connectors, but this is no use to us.

Unless I'm being thick, this seems to be a serious shortcoming of the Edge Transport role.  I'd settle for being able to forward blocked email to a mailbox (as with the Content Filtering role), but it seems you can't even do that.  

Question by:RG-Support
    1 Comment
    LVL 11

    Accepted Solution

    No, its not.

    The Edge server will scan the MIME signature of the attachment as well as the extension, and block it if it looks "a bit dodgy".

    I have seen this before with a customer, and had a SR raised (and refunded) regarding it.

    I agree it is a shortcoming Edge servers.

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