phpList is an open source, one-way digital subscription management tool. It is used to deliver information to a large number of subscribers who sign up to receive content, this content is sent out by an administrator via emails known as campaign messages. phpList’s additional features include:

– Keep sending messages even after you shut down your computer.

– A web interface that lets you write, send messages and manage phpList over the Internet.

– Throttling to avoid server overloads.

– Bounce processing keeps databases clean of unused or non-existing addresses.