Send mails with Outlook Express through Exchange 2000

If i use Outlook express to send mail to en exchange server i can do it FROM a different address than mine. I can write in the "from" field any address that i want.

If i try the same with Outlook, i cannot do that.

How can i avoid that possibilty with outlook express?

Who is Participating?
LeeDerbyshireConnect With a Mentor Commented:
I don't think you can stop this from happening.  OE submits messages via SMTP, and therefore Exchange will only check that the sending domain is valid.  You will probably find that you can send messages from  .  You should not, however, be able to send messages from (except when the recipient address is in your own domain), unless your server is an open relay.

Basically, SMTP (when not an open relay) will accept -> -> ->

If it accepts ->

then your server is an open relay.
llandajuelaAuthor Commented:
I mean, what config do i need to change in Exchange Server ?
is outlook set up the same way as OE? I don't think OE cant speak mapi, so it was probably set up as an SMTP/POP3 account. I think if you set your outlook account up as an SMTP/POP3 account (rather than an MAPI exchange client) you'd be able to do it.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.