How do you configure iMS 5.1 to only allow use secure AUTH mechanisms, CRAM-MD5 and DIGEST-MD5?
I want to use SMTP AUTH only with secure authentication mechanisms. LOGIN and PLAIN authentication aren’t secures. Do you know how to configure iMS 5.1 to only allow use secure AUTH mechanisms, CRAM-MD5 and DIGEST-MD5? Now all four are allowed:
250-AUTH CRAM-MD5 DIGEST-MD5 LOGIN PLAIN
MD5 mechanisms provides password security and client authentication. It does not encrypt the data stream, I can work with SMTP over TLS, but I only want password security for a best performance.

