Awesome
HaskellNet
This package provides client support for the E-mail protocols POP3, SMTP, and IMAP.
Some examples of how to use the library are contained in the example/ directory. You should be able to run them by adjusting the file for your mail server settings and then loading the file in ghci and type 'main'. eg.
ghci -hide-package monads-fd example/smtpMimeMail.hs main
If you encounter problems and want to debug the ghci debugger works well:
:set -fbreak-on-exception :trace main