Issue getting TLS 1.2 working for POP in Smartermail 15.x
Problem reported by Nathalie V - March 2, 2017 at 1:06 PM
Not A Problem
Smartermail version: 15.4
I'm not sure what we're doing wrong, but POP is still allowing non-TLS connections even though we've configured Smartermail to ONLY use TLS for POP.
(SMTP works on TLS)
These are the current settings:
(and each is configured to use a local certificate file and passes the certificate test)
There are 2 issues:
1) when I test via telnet to port 110, and enter "USER <username>" after it connects, it says "+OK User 'test' ok"  (it should disconnect at this point if it was only accepting TLS connections but it's accepting this)
2) the client connection in Outlook:  First of all I don't see a setting for POP for "tls" in Outlook, the checkbox says "ssl" (This server requires an encrypted connection(SSL).
I can only connect if I do NOT check the ssl box.
This also means it is accepting non-TLS (or non-SSL), and it should not be.
Are there other settings somewhere else we're missing? I'm only aware of the settings in IP ADDRESSES and PORTS in Smartermail.
I have restarted Smartermail after making each change.
Please advise.

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Rod Lasky Replied
Employee Post
Hi Nathalie.  Enabling TLS for POP does not disable plain text authentication.  So this would be expected behavior.
Rod Lasky
Technical Support Specialist
SmarterTools Inc.
(877) 357-6278

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