Hello,

I try to setup a IMAP proxy for my old Exchange server. Running Dovecot v2.x on Centos 7.

So far I follow http://wiki2.dovecot.org/HowTo/ImapcProxy and it seem to work. The only but major thing is with this setup - the communication between proxy and backend is not encrypted. :(

To fix this, I changed the config and add: imapc_ssl=imaps imapc_port=993

but it doesnt work, because of verify failure of the self signed backend certificate:

Jan 5 21:48:55 imap dovecot: imap(user1): Error: imapc(192.168.1.1:993): Couldn't initialize SSL context: Can't verify remote server certs without trusted CAs (ssl_client_ca_* settings) Jan 5 21:48:55 imap dovecot: imap(user1): Error: imapc(192.168.1.1:993): No SSL context Jan 5 21:48:55 imap dovecot: imap(user1): Error: imapc: Command failed: Disconnected from server Jan 5 21:48:55 imap dovecot: imap(user1): Error: user tkoenig: Initialization failed: Initializing mail storage from mail_location setting failed: Mailbox list driver imapc: Failed to access imapc backend Jan 5 21:48:55 imap dovecot: imap(user1): Error: Invalid user settings. Refer to server log for more information.

I didnt found anything in the documentation which tells dovcot not verify the backend certificate.

Is there a know way to get it runing?

Many thanks for any hint!

regrds, Tom