Mark Hellegers wrote on Sat, 16 Jan 2016 19:59:13 +0100 CET:
Missed this the first round, but the mail command you use in your
example does not exist on my system.
You're right, it's not in the default Haiku install! It was standard
in
BeOS, and maybe part of the MDR (Mail Daemon Replacement) project.
It just
writes the appropriately formatted mail file and the attributes mark
it as
mail needing sending, which the daemon will do when it next runs. A
copy of
the /bin/mail from BeOS works in Haiku, once you've set up the e-mail
accounts and the mail daemon is running.