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I already set this option and connecting to the mailserver without tls works fine for me.
I really DO want to make secure connections work.
I looked into the log file and found this after trying to connect via openssl
Feb 17 17:33:12 s18146878 postfix/smtpd[32587]: connect from unknown[myIP]...
I'm using plesk with CentOS 6.6 and the postfix/courier mail services
I tried to connect an existing mail account with a mail program like thunderbird.
But I'm not able to connect to it, except when I'm using "no connection security"
So I tried, if manually contacting the POP3s Port is...
I'm using plesk with CentOS 6.6
After setting up some e-mail accounts over the plesk gui I tried to connect via a mail software (like thunderbird).
This failed with every combination of settings I tried.
So I checked if the POP3/IMAP services are running correctly using telnet.
I connected...