Installing the SMTP (Simple Mail Transfer Protocol) service is only required if the Windows SharePoint Services 3.0 sites need to be enabled to receive incoming email. This is generally considered to be a more advanced feature, as a certain amount of configuration is required, and both site end users will need to understand that new email addresses are required and then understand what the results are.
CAUTION: Some organizations have policies in place which prohibit the installation of SMTP services on production servers that are not dedicated mail servers.
To install the SMTP service, follow these steps:
1. Click the Start button.
2. Click on Server Manager.
3. Click on the Features node in the Server Manager pane. Click on Add Features in the Features Summary pane.
4. Click on the box next to SMTP Server, and the Add Features Wizard window opens clarifying which role services and features need to be installed. Click the Add Required Role Services button. Click Next.
5. Click Next on the page which discusses the Web Server (IIS) role, which is already installed.
6. Note on the next page that the only new role service which will be installed is the IIS 6 Management Console, and click Next.
7. Review the installation selection on the next page, and note that SMTP Server will be installed, and click Install.
8. Ensure that the installation is fully successfully, and then click Close.
Completing the Configuration for Incoming E-Mail Settings
Now that SMTP Server features have been installed, the Incoming E-Mail Settings can be configured. To finish the configuration, follow the below steps:
1. Return to the Central Administration console and click Administrator Task Incoming E-Mail Settings, and then click the Configure Incoming E-Mail Settings link.
2. Click Yes under Enable Sites on This Server to Receive E-Mail.
3. Under Settings Mode, leave Automatic selected.
4. In the Directory Management Service section, leave No selected. If Yes is selected, users can create distribution groups and contacts, but an AD container needs to be identified where new distribution groups and contacts will be created and additional settings configured. This is a more complex configuration to administer and not recommended for most test implementations.
5. In the Incoming E-Mail Server Display Address section, adjust the default display address if needed.
6. In the Safe E-Mail Servers section, either select Accept Mail from All E-Mail Servers or Accept Mail from These Safe E-Mail Servers. If the second option is selected, the FQDN (Fully Qualified Domain Name) of the “safe” e-mail server needs to be entered.
7. Click OK when you are finished.
8. You will be back to the Central Administration console Home page and the Administrator Tasks list should no longer include the task item for Incoming E-Mail Settings.