The mail environment in which you could practically run MH <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;MH_Message_Handling_System" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;MH_Message_Handling_System</a><p>The tool is still around, but I long ago knuckled under to rich email, and I really like imap, at home and at my provider.<p>But I so loved the MH environment of separate commands that ran in the terminal, and that you could easily use all the existing unix utilities because your messages were just text files.