Microsoft SQL Server/Configuring Mail

First of all: SQL Server Mail does not depend on Extended Mapi.

Prerequesites for Database Mail:
 * Database Mail has to be enabled via the Surface Area Configuration Tool, Database Mail Configuration Wizard or the sp_configure.
 * Service Broker needs to be enabled in the Database Mail host database msdb
 * The Database Mail externals executables need access to the SMTP Server

Architecture
Four Components: Configuration Component, Messaging Component, Database Mail executable, Logging and auditing component.

The configuration components consists of a database Mail account and a Database Mail profile. The Database Mail account contains the information that SQL Server uses to send e-mail messages to the SMTP server, such as the SMTP server name, the authentication type, and the e-mail address.