cyrus imapd + multiple domains

[Danny Garcia Hernandez]

hello list!!!   the year begun, but for me itīs time to go and work :( .   well, here is my problem. i have a linux box running cyrus imapd server (2.1.9) with cyrus-sasl (2.1.9)and compiled with "--with-auth=unix". all is working fine!!!.   right now, we are hosting another domains and we want to give them mail service throught the actual imap server. i was reading and looking for docs, and i have found a very similar situation but using ip alias (i canīt use that). please, can any body expose a solution to configure cyrus imapd with multiple domains.   thank in advanced danny