Simple Authentication and Security Layer

About
Simple Authentication and Security Layer (SASL) refers to either:
 * a list of requirements for authentication mechanisms and protocols
 * specific software that implements those requirements

Linux
In Linux, SASL may be handled by saslauthd.

To see if saslauthd is running: "ps aux | grep saslauthd" should return a process for every active connection (e.g. Rizzo shows half a dozen), not counting the grep command itself.

Postfix-Dovecot
eventually make a page about this

Tests
 * openssl - depending on what protocols you have enabled (pop3 or imap):
 * openssl s_client -connect localhost :imaps
 * openssl s_client -connect localhost :pop3s

If you are running this command from a different machine than your IMAP/POP3 server, replace "localhost" with the name or address of the server.

Type "QUIT" to exit, if openssl does not return you to a system prompt.

Caveat: This can seem to be working and yet Dovecot/Postfix will still be reporting fatal: no SASL authentication mechanisms.

Reference

 * Dovecot wiki
 * Dovecot wiki