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x400 and Exchange 2003, What is the purpose

DO i need x400 address in my default recipient policy?
I mean do mail servcers still rely on it or can they do just SMTP?

Just curious.  

1 Solution
It is still used internally by Exchange.
Plus it is used in larger deployments of Exchange.

The rule with Exchange is if you don't understand - don't touch.

Many people start removing things that they don't think they need, only to find a few hours later that email isn't being delivered and the event log is full of errors.

EricIT ManagerAuthor Commented:
heh, i had no intention of removing it.
it just bugs me.  I found that clients moved from one ex to another (in different domain), outlook remembers email addresses based on x400, which is no longer correct.

where if it used smtp it would have worked.  tahts what made me curious.

Thanks again simon
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