Need to getyour
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 does the Import tool only have Excel files not CSV or raw CSV upload?

The CSV file and raw CSV import data methods of importing are only available to users who use PHP 4.3+. This is due to the fact that the enclosure parameter for the fgetcsv() function was not added until PHP 4.3.0.

Users who need to import their lists are encouraged to open your CSV file in Microsoft Excel or OpenOffice's Calc and save their file as a .xls to import into ListMessenger.