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How to send outside our domain

We are switching to Exchange from a web based email service.  The problem is that during this transition is when someone sends to name@domain.com from there exchange account it never makes it to our old webhost were some of our users are still checking their e-mail.  I think that what is happening is the emails arent making it to an external smtp server and are being routed internally by exchange.  How can I force the e-mails to be sent outside our local domain regardless of where they are addressed.
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1 Solution
First, you either need to use exchange or your webhost, not both.

Second, as long exchange has external connectivity, it will send mail outside. (for the most part)

A couple quick questions:
1- Can users send mail to ANY external address from their Exchange accounts? (ie, user@gmail.com or user@hotmail.com)?  
2 - Do you receive incoming mail to your exchange accounts?
3- Have you migrated your MX record to point to your exchange server?
4 - Are you using a smarthost to relay outgoing mail through? (This is most likely going ot need to be configured or you will end up on Spam Lists very quickly, which you may already be on)

 - Brugh

WoodietmAuthor Commented:
1- users can send to any other external address it is only our own webmail that it cant reach

2- the incoming mail is being recieved from our webhost via outlook and then saved into exchange box

3- no we havent yet

4- we are relaying outgoing messages through our webmail hosts smtp server

Is there a way I can just turn off local delivery of messages so that all mail gets sent to the smarthosts?
WoodietmAuthor Commented:
Problem is solved

Outgoing mail server was not resolving IP of our domain.
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