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Email - must use TLS - deny
Posted on 2013-05-22
Some user's on another domain (.gov domain) are getting these replies back when trying to e-mail some users on our own domain (non-government domain).
The messages will read like this to them:
The message or an attachment did not reach the intended recipient(s).!
Subject:
From: user@domain.gov
To: user@ourdomain.com
Date: Wed, 22 May 2013 02:19:33 -0600
Reason: domain.gov must use TLS
Action: deny
Is this usually something can be fixed on the exchange end of our domain or something going on with the government domain email server?
The messages will read like this to them:
The message or an attachment did not reach the intended recipient(s).!
Subject:
From: user@domain.gov
To: user@ourdomain.com
Date: Wed, 22 May 2013 02:19:33 -0600
Reason: domain.gov must use TLS
Action: deny
Is this usually something can be fixed on the exchange end of our domain or something going on with the government domain email server?
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3 Comments
Probably the gov end. Here's a good tool to check whether TLS is working properly:
http://www.checktls.com/
http://www.checktls.com/
Sounds like their servers are configured to only send out encrypted emails, but yours might not be. So their server, when discovering that your server won't handle the TLS connection, blocks them from sending to you. Could be that it's a default with their server. Could be that it's with their individual clients.
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