vvrpgsporcupineorg werner vd merwe understand correctly assign user remote branch alternate email address specify postfix server domain transport servers receive mail ervvexamplecom need know users mailbox idea use aliases map ervvexamplecom userservernameexamplecom aliasing happens without changing addresses fromtoccetc message headers alias expanded mail either delivered server servernameexamplecom name forwarded machine servernameexamplecom consistency aliases need shared among servers accept mail userexamplecom something like ldap sql would job works delivery controlled envelope sender address information message header wietse tue 05 aug 2008 222254 0500 muliple site single domain