The imp-users mailing list is provided for users of IMP. It is for discussion of and help with the use of IMP. Both users and developers are encouraged to subscribe to the list. Prior postings are also archived.

The imp-dev mailing list is provided for developers of IMP. It is for technical discussion of the development of new features in IMP, such as the design of new C++ or Python classes. Developers are encouraged to subscribe, but regular users are encouraged to use the imp-users list instead. Prior postings are also archived.

The imp-build list sends out an email every morning with the results of the nightly builds of IMP. All developers are encouraged to subscribe to this list, so they can be notified if they break the build. Developers that work only on a subset of modules can choose to be notified only if one of those modules fails (go to the imp-build page, select 'Unsubscribe or edit options', log in, then select one or more modules, systems or applications from the topic filters.)

The imp-commits list sends out an email every time code is changed in the IMP git repository. It can be a high traffic list, and is only recommended for developers that want to keep an eye on new developments.