John,
jebswebs:More lately, I have been using a server-based product that runs through my web hosting service. This FOSS product is called
PHPList
My experience with PHPList, was that you had to be fairly technically capable to understand how to get things to look right. It may have become more user friendly since I used it a few years ago, but if not, this is not a 'beginners' product.
jebswebs:My experience has been that you get what you pay for and the more you are willing to spend, the better your results.
If you are comparing the paid service of Constant Contact to PHPList, I agree. However, if you are comparing the wide range of hosted email services, I disagree. The cost of these services runs the gamut, from quite inexpensive, like Constant Contact, to very very expensive. On the high end, my sense is that more isn't better in this case.
Also, another resource for nonprofits is Vertical Response which has a free service for nonprofits.
Best wishes,
Sasha