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My smartermail server IMAP port 143 is not working. I also tried to open different port but still not work. i check my firewall rules and it is ok. i off the windows server 2012 r2 firewall but still no success. I have enabled the IMAP port from smartermail admin > Settings > Branding > ports.
I also enable the IMAP port to IP address, from smartermail admin > Settings > Branding > IP Address.
did i miss something in windows server 2012 R2 ? This is new installation. other pop3 and smtp ports are working fine.