Windows SQL Server supports MAPI. Unfortunately, it is for sending only. The command's syntax is shown below.
xp_sendmail @recipients, [@message] [, @query] [, @attachments] [, @copy_recipients] [, blind_copy_recipients] [, @subject] [, @type] [, @attach_results] [, @no_output] [, @no_header] [, @width] [, @separator]
To obtain a request, the MAPI agent or some other receiving agent must be used.