SharePoint 2007: The Definitive Guide
by James Pyles, Christopher M. Buechler, Bob Fox, Murray Gordon, Michael Lotter, Jason Medero, Nilesh Mehta, Joris Poelmans, Christopher Pragash, Piotr Prussak, Christopher J. Regan
Using Email Servers
Your email-enabled groups, libraries, and lists can receive emails routed through the server hosting the SharePoint site collection or via another server such as Microsoft Exchange Server. There are a few advantages to having mail routed through a separate server rather than being sent directly to SharePoint:
- Authentication
The SMTP service on the SharePoint server cannot require users sending email to authenticate to the system, but Exchange does have this ability. If you are using Exchange for your mail services, the site owner or administrator and go to Central Administration in SharePoint and select the option of accepting mail only from authenticated users.
- Spam filtering
Exchange has the capacity to filter unwanted mail traffic, preventing unsolicited mail from being received by SharePoint and perhaps subsequently posted to lists and libraries.
Regardless of the mail server option you select, if you are going to enable mail support for your site, take adequate security precautions to prevent your system from having viruses, adware, and spam introduced into SharePoint through mail traffic.
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