First you must enable the SharePoint 4.0 library or list to accept messages from any sender.
To verify whether you have the correct settings, go to the library or list and click Library/List Settings under Library/List Tools > Library/List > Settings.
Incoming email settings should look like this:
You cannot receive messages to the SharePoint list or library from external senders because our servers are not configured to accept email from external servers due to security reasons. However, you may use the following workaround.
To configure mail delivery to a SharePoint list or library from external email addresses:
- Create a contact for this SharePoint document library in CONTROL PANEL, on the Services > Company Contacts page. The contact should have the same email address as the mail-enabled library or list. In the above example, the contact would have the email address email@example.com and any Display Name.
- Create a distribution list in CONTROL PANEL, on the Services > Distribution Lists page. The distribution list must have the email address that you will provide to your customers to send documents to.
- Make the created contact a member of this distribution list.
Example: The distribution list email address is firstname.lastname@example.org. The Company Contact email@example.com is the only member of this distribution list. To send a message to the document library, external users will send to firstname.lastname@example.org. The message will be forwarded to email@example.com and then appear in the document library.
When you have set this up, mail sent to this distribution list should be delivered to your SharePoint site.