rossbach david knicvsbjssoaylevel3com run postfix base inboundoutbound mail relay customers currently servers configured inboundexamplecom outboundexamplecom respectively purchased another domain newdomaincom want customers start use inboundnewdomaincom outboundnewdomaincom well keep current outboundinboundexamplecom customer base migrate new domain names adding cname record newdomaincom customers able relay either name concern postfix customers mta configured sending email newdomaincom postfix servers configured examplecom concern mtas reject mail different domain names sendreceiving advice help would greatly appreciated thanks dave thu 07 aug 2008 040605 0700 customer migration question