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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.
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How do recipients choose between text and HTML e-mails?

Messages sent with ListMessenger are sent using multi-part alternative, which means that if the end-user's e-mail client supports both and has enabled messages to be displayed as HTML; they will be displayed as HTML.

If a user's e-mail client does not support either, they have HTML messages disabled or there is no HTML version of the message present, e-mails sent with ListMessenger will be displayed as plain text.