[Dovecot] address of dovecot server

Hi,

How can I find out what the address of my dovecot server is? The server is working fine, and clients can check it using the intranet name of the server machine. However, I'm not sure what address to provide in clients outside my home network so they can access the server. Is it simply the standard convention of 'machine.domain.com' address of the server? Thanks for any help.

Cheers,

-- Seb