In a traditional environment the MX records in public DNS point to your Edge Transport Server (or any other anti-spam and anti-virus solution of course) where the inbound messages are screened for spam or viruses. In the past this was known as “Exchange Hosted Services” but it is rebranded to “Forefront Online Protection for Exchange” or FOPE. Personally I think the anti-spam and anti-virus solution is a perfect candidate to host “in the cloud” and Microsoft has an offering for this. This means additional investments in hardware and software, and the Edge Transport Servers need to be managed as well. But when you have a larger organization you probably need multiple Edge Transport Servers. And I have to say, the Edge Transport Server is quite effective in doing this. In my previous article I explained about implementing the Exchange Server 2010 Edge Transport Server in the DMZ as a means to fight the amount of spam that will enter your Exchange organization.
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March 2023
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