Hi, you might want to check out Akubo (
www.akubo.net). It's a database for small organizations but it also has mailing list capabilities. It's exclusively for small organizations so no more than 5000 records. We use it for a non-profit we're involved with, but I also use it for my small business, so it's very flexible. There's a birthday field and also another customizable date field and you can run reports on those fields. They're also adding a feature for email alerts that can be setup for those date fields. And it's web-based, so you can access it from anywhere.
Robin Abello
Tapulanga Foundation