What is ZMail?
ZMail is an open-source Python application that allows you to send emails from anyone, to anyone. In other words, it can be used to send fake or anonymous emails. You can also use it to test SMTP servers.
See the screenshots section for images of ZMail, and to get a better understanding of what it does.
There is an excellent documentation for ZMail, written by Ralph Loizzo. This can be found at the ZMail Wiki.
If you need an SMTP server, check this page. It has a regularly updated list of open SMTP servers, perfect for use with ZMail.
Thanks to Sourceforge!
Without sourceforge, this project would not have been possible.