MDN’s new design is in Beta! A sneak peek:

This page will explain how to create a .rdf or .xml file that you can place in the $INSTALLFOLDER/default/isp to do a variety of things. This page applies to Thunderbird (Mail/News).


These files allow for adding to the New Account wizard a new option, and help with, among other things, deployment of custom Thunderbird.

Tools needed

The files are simple text files, in UTF-8 encoding, so use your favorite modern text editor. A working install of Thunderbird is also handy for testing.

Getting Started

First take a look at the number of examples available:

See the Thunderbird ISP hooks for more details.

Document Tags and Contributors

 Contributors to this page: Kohei, kohei.yoshino, Poningru
 Last updated by: Kohei,