I am using Campaign Monitor, which allows me to track how effective my newsletters are. I updated my module and now automatically add subscribers to Campaign Monitor.

I have used Simplenews, and I liked it, but this was a quick hack and I didn't think about it. Adding support for other newsletters managers should be just a matter of adding the right code to the custom submit function in Newsletter Checkbox. IF anybody does it, let me know.

I haven't had the time to test but I'm almost sure that this module should work with Drupal 4.7. There are just a couple of very standard hooks, one is just help text, and the custom submit function.

Cheers.

Alexis Bellido