This plugin works and is useful to test if your email is working, but do not leave it activated on your site after you're done with it. I found that a class built into this plugin ("Plugin Register", at http://wordpress.org/support/view/plugin-reviews/plugin-register) caused pages in my WP Admin to take 10-15 seconds to load!
Deactivating this plugin fixed it again. So remember not to keep it active!
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