MIMP is a project to create a version of IMP suitable for small mobile devices such as WAP phones or PDAs. Basic IMP functionality is implemented including mailbox viewing and paging, viewing messages, deleting, replying, forwarding, and composing new messages.

As of IMP 5.0, the MIMP display, as well as an expanded mobile interface for smartphones has been fully incorporated into IMP. All support and development questions are handled through the IMP project.