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Listener Design

tanwer
Level 1
Level 1

Our current setup is Ironport relay email to exchange and vice versa, management has come with new solutions trendmicro DDEI they want all inbound mail to go from Ironport -> trendmicro -> exchange and outbound email exchange -> ironport .

Currently we are using only 1 listener for both inbound and outbound. 

Should I create new listener and add DDEI IP as relay and how should I make sure outbound email works 

Kindly need your support.

2 Replies 2

You don't have to create another listener. I always go with 2... one public that's nat'd out to the internet, one private that Exchange talks to. Also helps keep flow straight in my head.

If your case you really only need change your SMTP routes to send everything for your internal domains to the TrendMicro box, make sure the Trend box allows the ESA to send mail through it, and then allow the TrendMicro box to talk to exchange. Also make sure the filters on the Trend box aren't checking SPF/DKIM/DMARC as that's going to be wrong since the mail from outside now looks like its coming from your ESA, not the actual sender.

Exchange out to Ironport and from there to external parties doesn't have to change at all.





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Thank You.

Thankyou for reply our new trendmicro & ironport is physical appliance will SMTP route work ?