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I recently had a request to change my receiving message size limit from 10MB to 20MB. &nbsp;The sending limit is set to 28MB. &nbsp;Traditionally message sending and receiving limits were set very low limits no higher than 2MB. &nbsp;Can someone advise or point me to an article that discusses Microsoft's best practices for this. &nbsp;I want to make sure that setting such a high size limit is safe for my organization and won't cause server congestion.
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I recently had a request to change my receiving message size limit from 10MB to 20MB.  The sending limit is set to 28MB.  Traditionally message sending and receiving limits were set very low limits no higher than 2MB.  Can someone advise or point me to an article that discusses Microsoft's best practices for this.  I want to make sure that setting such a high size limit is safe for my organization and won't cause server congestion.

Message Size Limits in Exchange 2003

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

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.