According the information available on the internet. It seems it's not possible to have the backend encrypted. I've solved this issue by setting up a point-to-point vpn tunnel between the proxy server and the mail server and sending the backend traffic over the tunnel: http://openvpn.net/index.php/open-source/documentation/miscellaneous/78-static-key-mini-howto.htmlby appie_1985 - Other discussion
Hello, The following setup is working: Client --> Nginx (IMAPS Port 993) --> Mailserver (IMAP Port 143) But the following setup is not working: Client --> Nginx (IMAPS Port 993) --> Mailserver (IMAPS Port 993) I see on error.log file no specific log entries. Only on the mailserver I see the following entries: 2012-08-13 17:48:31,243 ERROR ProtocolHandler - Exception occurby appie_1985 - Other discussion