Postie allows you to blog via e-mail, including many advanced features not found in WordPress's default post by e-mail feature.
Within a very short time of loading the Postie plugin - off the WordPress.org plugin site I was contacted by the web host to say that they had detected a lot of emails sent from the site (It was a clean new WP site). They discovered the Postie plugin had sent approximately 70K messages. (darn - I hate to have contributed to that).
I had found the plugin via some reviews (thought they were safe ones).
I cannot recommend using this plugin and I suggest anyone using it should be cautious and check it has not been compromised.
This has been a staple of my site for over 4 years. However, the recent changes to programming have made it unuseable, leaves blank posts. If you can find a version prior to January 2013, use it.
When i tried to send a email test, a lot of SPAM was send to my email address. Uninstalling...