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Have you checked the user's inbox?<br />
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Have you tried sending a message with read/delivery receipts to see if it landed somewhere?
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Have you checked the user's inbox?

Have you tried sending a message with read/delivery receipts to see if it landed somewhere?

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Ok, so here is the problem. We currently use exchange 5.5 with SMTP, POP3, IMAP4 all dissabled. Our users use Outlook with an Internet mail account that when checked, stores the emails into the Exchange Mailbox in outlook. Basically we use exchange to share information and to store emails.. it doesnt send/receive anything. But now comes the problem. &nbsp;Our global address book and recepients list includes all of our users, and I changed the SMTP to the internet mail account so when you use the company GAB list it sends to the internet mail account and not the @internalIP account for the exchange box. Recently, when a user creates a New mail message addressed to an internal user off of the GAB the email gets lost somewhere. It never reaches its destination and doesnt show up in a Badmail folder.. etc. &nbsp;<br />
<br />
To make things more interesting, we can send/receive email fine from an external mail account (hotmail, aol, etc. etc.). Its just the internal GAB that is somehow handling the messages wrong. <br />
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So, any ideas?
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Ok, so here is the problem. We currently use exchange 5.5 with SMTP, POP3, IMAP4 all dissabled. Our users use Outlook with an Internet mail account that when checked, stores the emails into the Exchange Mailbox in outlook. Basically we use exchange to share information and to store emails.. it doesnt send/receive anything. But now comes the problem.  Our global address book and recepients list includes all of our users, and I changed the SMTP to the internet mail account so when you use the company GAB list it sends to the internet mail account and not the @internalIP account for the exchange box. Recently, when a user creates a New mail message addressed to an internal user off of the GAB the email gets lost somewhere. It never reaches its destination and doesnt show up in a Badmail folder.. etc.  

To make things more interesting, we can send/receive email fine from an external mail account (hotmail, aol, etc. etc.). Its just the internal GAB that is somehow handling the messages wrong. 

So, any ideas?

Using Exchange 5.5 with Internet mail

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.