[Dovecot] dovecot and avahi

[Robert Moskowitz]

I am trying to figure out if I need avahi on my mail server.  I see that 
POP3 and IMAP are services that Avahi can advertise/discover. Does 
Dovecot work with Avahi and how do you get POP3 and IMAP advertised?

And perhaps more importantly, what clients look for mail services this way?
I can't find any information on this in the Dovecot documentation ot 
googling.  Perhaps my search fu is low this year.

thank you