It provides some high-level datatypes for declaring MIME email
 messages, functions for automatically composing these into
 bytestrings, and the ability to send bytestrings via the sendmail
 executable. You can also use any other library you wish to send via
 different methods, for example directly to SMTP.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.