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ListMessenger exceeds expectations as a well designed, easy to use, lightweight mailing list management solution for your website. ListMessenger is feature packed but because of its intuitive design remains simple to use and easy to maintain.
ListMessenger 2.2.1 Now Available Follow @ListMessenger on Twitter

Why doesn't the Spell Checking show up in my version of ListMessenger?

The text message spell checking requires that you have pSpell support compiled with PHP. If you do not have pSpell support compiled with PHP, the "Spell Check" button will not be available to you.