Emailchef is a powerful program which can be used to send HTML Email to your mass lists through your existing POP Account. Try connecting it to your gmail, yahoo, or hotpop account, or set it up to connect to your existing Web server.
Emailchef can connect to external databases that are local, and also external databases through ODBC. It comes with a nice interface to store your own templates, and easily create great html Emails. It also has an automated ftp system to easily upload your images to your Web server. Try it for free for 15 days.