Hello. I need to restrict access to IMAP ports to a few users, so that all users can use POP3 and just a few of them will be able to access IMAP.

I use secure connections POP3s and IMAPs. Is it possible?

Also... When I connect to the Dovecot server using Outlook (IMAPs) I get a Warning message,something like:

"The server you are connectiing to uses a non verified protection certificate.

A chain of certificates ...so on ( I can't translate :) )

Continue using the server? "

How can I fix that warning?

Thanks