[Dovecot] dovecot and avahi

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