Apex Email Service

Email services are automated processes that use Apex classes to process the contents, headers, and attachments of inbound email. For example, you can create an email service that automatically creates contact records based on contact information in messages.

Visualforce email templates cannot be used for mass email.
You can associate each email service with one or more Salesforce-generated email addresses to which users can send messages for processing. To give multiple users access to a single email service, you can:
To use email services, from Setup, click Develop | Email Services.
When defining email services, note the following:
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