Vim has for many years been able to be integrated in different programs and among those have been some mail clients—most notable is the open-source mail client Mutt.
For some Vim users, however, this was not enough, and they started to implement entire e-mail clients in Vim script—including support for sending, fetching and organizing mail directly from within Vim.
You can find the latest version of the free open-source mail client Mutt here: http://www.mutt.org/.
In 2004 Suresh Govindachar created what he called The Mail Suite (TMS) for Vim. It was a mail client implemented partly in Vim script and partly in Perl script (embedded ...