[SR-Users] Kamailio 4.3 Rewriting From and db_alias values

Hi forum, This is the scenario: VM <- Kamailio -> SP1 ----- SP2 ---- PhoneA (john) PhoneB PhoneA is configured in *dbaliases* table: alias_username, alias_domain, username, domain 11111111, sp1.com, john, sp2.com When PhoneB dials 1111111, Kamailio converts 111111(a)sp1.com to john(a)sp2.com Now I need to provide VM services to PhoneA. (Opposite direction) PhoneA calls voicemail but the calling number is john(a)sp2.com I need to have SP1 use the 11111111(a)sp1.com format How can I overwrite the From? Pseudo algorithm ------------------------ If destination is VM and from domain ($fU) is sp2.com: Find user URI: ( In this case john extracted from john(a)sp2.com in dbaliases) If user is found: rewrite From URI: use alias_username@alias_domain I'm using default kamailio.cfg and calls successfully are forwarded to VM Thank you