Currently we have a legacy Axway Mailgate clustered appliance that sits in our 
DMZ that buffers mail between Exchange on premises and Mimecast cloud services 
(i.e. external send, receive, SPAM control, and message hygiene).  I have 
considered replacing Mailgate with the Exchange Edge Role, but I don’t see the 
value add considering what Mimecast already provides.  I don’t really want to 
forward Mimecast traffic thru my firewall to my internal exchange servers 
directly.  A simple DMZ hardened Windows Server 2008 SMTP relay seems like a 
plausible option.  What is your best practice recommendation for that buffering 
link between Mimecast cloud, and Exchange internal?



Keith D. Beahm | Network Engineer | Stinson Leonard Street LLP
1201 Walnut Street, Suite 2900 | Kansas City, MO 64106-2150
T: 816.691.3374 | F: 816.412.1022
[email protected] | www.stinsonleonard.com<http://www.stinsonleonard.com>

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