I'm trying to help a non-profit client of ours set up a way to e-mail their 1,100 members at once. We have approval from our co-lo to allow that kind of volume once per day from their account. However, I can't seem to find a free tool that answers all of our needs.
Does anyone have any experience with a free or even inexpensive PHP/MySQL combo mailing list management tool that allows for good control of user list and flood control of messages? We're talking not many messages, as I state above, but it's a lot of destination addresses all at once - we can't have half of them bouncing back to my client each time they try to send something.
We've considered external solutions like Constant Contact, but they're just too much money over time. They'll spend a couple of hundred bucks up-front, but not $30/month for the rest of their existence.


