x500 and x400 smtp addresses

[tomcat]

hi all

what's the purpose of x400 and x500 SMTP addresses that are created when
a mailbox is created for a user in Exchange 2003?

thanks

[John Fullbright]

An x500 style distinguished names to identify each recipient. To ensure
delivery to all recipients regardless of where they were migrated from an
x500 proxy address is added to migrated 5.5 users that matches the DN of the
source. When you use exmerge to do an interorg migration, these x500
addresses are missing and replies to old messages will NDR unless you add it
back.

If an object contains only an X500 address and does not have an SMTP
address, and you try to send mail to it via SMTP, exchange encapsulates the
address in an SMTP address like this:

IMCEAEX-_O=Organization_OU=Site_CN=ContainerName_CN=som...@microsoft.com

This could be a sign that the RUS is not properly stamping or the that the
SMTP address has been removed from the user

"tomcat" <t...@nospam.com> wrote in message news:fmguhg$72u$1...@aioe.org...

[John]

Sorry for tagging along someone else's post. I have a similar question. For
some reason I only have X400 and SMTP addresses. There is no X500 address.
My server is an Exchange 2003 SP2. Mail flow works fine. I'm just curious
why there's no X500 and whether or not it's necessary.

Btw, my Exchange server 2003 is a result of an upgrade from Exchange 5.5. I
put a new Win2k3 box (member of AD), installed Exch2003 + SP2 in the same
Exch5.5 org. Also installed ADC then I moved mailboxes from 5.5 to 2003.
Exch 5.5 is no longer in use.

"John Fullbright" <fjohn@donotspamnetappdotcom> wrote in message
news:uPXOYJx...@TK2MSFTNGP04.phx.gbl...

[John Fullbright]

It's an x500 address in the format

/o=ExampleAB/ou=Organizationalunit1/cn=Recipients/cn=Username

That's the format used by the 5.5 directory. (because you upgraded from
5.5)

x400 is a transfer protocol.

"John" <a> wrote in message news:OmPueX5V...@TK2MSFTNGP02.phx.gbl...