How to enable Incoming email on the list/Library in Sharepoint

Below are the steps that we need to perform to enable a library to receive incoming emails.

1) SMTP service has to be installed and enabled on the SP WFE server. This can be added from Windows Server manager under Features and add the SMTP feahttps://www.blogger.com/blogger.g?blogID=122518409722023608#editor/target=post;postID=695350418594854018ture
2) Next step is to open the IIS 6.0 amangement console and make sure that SMTP virtual server is up and running. If you want to ahve your own name, stop the existing one and create a new one with a good name and run it.
3) Now you open the windows serverices and start the SMTP service in WFE server and make sure it is set on Automatic.
4) By default the port assigned to SMTP service is 25. so make sure you have port open and is not blocked to enable the incoming email service.
5) Now open Central admin, configure Incoming email settings,
Select Yes to “Enable site on this server to receive e-mail”
Select “Automatic” for Setting mode or Advanced (Put the system drive inetpub directory for drop folder)
Select “Yes” to use the SharePoint Directory Management Service to create distributions groups and contacts.
Enter your Active Directory container details, i.e. the Organizational Unit container that we created specifically for our SharePoint 2010 contacts.
Ensure that your SMTP server details are correct, this should be the fully qualified domain name of your SMTP service that was installed on your SharePoint Server.
6) Make sure following accounts are added on drop folder with below permissions
WSS_Admin_WPG – Full Control and
WSS_WPG – Read & Execute / List folder Contents / Read
7) Also make sure that application pool account has read permission on the Drop folder as well to carry email over to the site level.
8)  Now open the list\library and
Click on Incoming e-mail settings.
Select “Yes” to allow this document library to receive e-mail.

Thats it. now try sending email to the address and you will see email in the library

Below is a very good link with screenshots that can help
http://sharepointgeorge.com/2010/configuring-incoming-email-sharepoint-2010/