About jceesco

jceesco · 02-27-2019

Hi,I have a C170 cluster who receive emails on port 25 for mydomain.com :mail1.mydomain.com (MX)mail2.mydomain.com (MX)I have only one Incoming listener, connected to my DMZ network. When I use SMTP Diag Tool to test if relay is open from internet :E...

jceesco · 02-27-2019

thank you, I'll check this paper.In fact, only my Exchange Servers (on LAN) have to be relayed by IronPort. That's why I don't understand why IronPort allows relaying from/to mydomain.com from internet.

jceesco · 02-27-2019

Thank you for your help. Sorry, but somemone can send a fake legit email. Because no authentication is required.user1@mydomain.com can send to user2@mydomain.comand user2 can't see if the sender is really user1.do you understand ?

Member Since	‎02-27-2019 12:01 PM
Date Last Visited	‎03-01-2019 02:02 AM
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How to prevent open relay on my domain ? (ironport C170)

Re: How to prevent open relay on my domain ? (ironport C170)

Re: How to prevent open relay on my domain ? (ironport C170)