i have two exchange 2003 questions
first - i have a problem where if someone sends to person@domainA.com they get a undeliverable saying that their message couldn't be delivered to person@domainB.com
is this a DNS thing, or would something in exchange be sending emails directed to domainA.com to domainB.com?
also, in the relay section, if i try checking "allow authenticated users regardless of list above"
is the change immediate, or is there a lag to propagate the changes?