the SharePoint server has been set up to allow inbound SMTP messages,
specific SharePoint lists and document libraries can be configured to
store the contents of the email messages, the attachments in the
messages, or both.
Using Email-Enabled Document Libraries
To email-enable a document library in a SharePoint site, do the following:
From the document library, click the Library tab; then select the Library Settings button from the Ribbon.
Under the Communications category, click the link for Incoming E-Mail Settings.
From the Incoming E-Mail Settings for the document library, check to allow the doc library to receive email, as shown in Figure 1.
Figure 1. Enabling incoming email on a document library.
Enter an email address. This email address will be added to the contact object that will be created in AD.
how to handle attachments, whether to save the original .eml file, and
what type of security policy you will set on the document library. If
messages can be received from any sender, this may open up the document
library to spam.
OK. After the contact object is created, usually within a few minutes,
the document library will be ready to accept messages.
This same process can be followed for any document library or list within the SharePoint farm.