I'm on a Windows Vista Busines PC network with a MS Server 2003 server. There are about 12 PCs on the network all set up the same basically. The PCs were set up some months ago to use Windows Fax and Scan using MS Exchange Server. For some reason, I cannot now send email from Outlook. Nothing has changed that I know of. But I do receive emails sent to me. Also, I do receive emails I send to myself.

When I send an email, I eventually (about 24 hours later) get a "Delivery Status Notification (Delay)" message telling me I do not need to send the message again. Then in about another 24 hours, I get an "Undeliverable: [My Subject line text]" message. That message says "Your message did not reach some or all of the intended recipients." It gives the address to which I sent the message and then says, "Could not deliver the message in the time limit specified. Please retry or contact your administrator." I am the closest thing to the administrator, though it is not my specific expertise.

I don't know that much about MS Exchange Server (though I set up the users) and Outlook. I've searched the web and the results I get all seem to deal with accounts with POP3 and SMTP servers. I'm really the only user who uses the email with Outlook but we want the others to start using Outlook soon.

Any help is much appreciated!