X-Ray Mail Assistant is a powerful mail processor that can filter, add, change or replace headers in incoming and/or outgoing email messages. It works with a set of user-defined rules that allow you to define the header values to be processed, and also perform additional actions like extracting headers to a text file, or importing headers from a file. The program is very flexible, and also includes options to use variables to create dynamic header content and more. In addition, X-Ray Mail Assistant can also auto-switch between SMTP servers, and allows you to setup multiple profiles for POP and SMTP servers and switch between them from the system tray. X-Ray Mail Assistant runs as a local POP/SMTP proxy. The documentation is rather poor, and this software should only be considered by users that are familiar with POP/SMTP functionalities.
