LetterRip makes setting up and maintaining mailing lists easy. The server is fast and stable, and makes an excellent addition to anyone's Internet or Intranet presence. PROS Fast, easy to set up, stable, small RAM requirements. Clean and easy to use interface. CONS Can't run on the same machine as any other SMTP server, and is not a full email server.
List importing can be time consuming.
A mailing list server is something most people buy once and then tend to forget about. It's a lot like a toaster in that respect. No one wants to continuously worry about its operation. Ease of maintenance and reliability are the two key criteria for each. In a world of ever increasing complexity, it's nice to see that some people still have the ability to make stuff easy.