Slow Mail Delivery

If the Microsoft Exchange Server computer appears to be delivering mail more slowly than normal, one or more of the following can be backlogged:

• The message transfer agent (MTA) queue
• The information store (public or private) queue
• The Internet Mail Service queue

Ask the following questions to isolate the problem:

• Is the server handling too many users?
• Has the user activity changed? (Are users sending more mail than usual, sending mail with large attachments, or sending to large distribution lists?)

The following sections describe how to isolate the problem further.