If you have been following my blogs over the years you should be aware that I’ve always been using Exchange Edge Transport servers in front of my Mailbox servers for message hygiene purposes. My last (well known) environment looked like this:
There are two Mailbox servers (Exchange 2013 and Exchange 2016) and two Edge Transport servers (also Exchange 2013 and Exchange 2016). MX records point to both Edge Transport servers and there are two Edge Synchronizations. And the Edge Transport servers were capable for DKIM signing (as posted in a previous blogpost), but lacked DKIM verification and DMARC validation.
The most important part in the Edge Transport server is the Real Time Blocklist, configured to use Spamhaus for connection filtering. While this works pretty well (there still is quite some spam that gets delivered into mailboxes) there is always room for improvement. I have been looking at cloud solution, but they didn’t always deliver what was expected.
A couple of my customers are using Cisco Email Security Appliance (previously known as IronPort) solutions on-premises and are happy with it, so time to start testing a Cisco Email Security Appliance (ESA) in my own environment. Continue reading Cisco IronPort and Exchange 2016