Cutting sendmail out of the loop

[Robert Bonomi]

> Date: Sun, 04 Sep 2011 15:44:45 -0600
> From: Brett Glass <brett at lariat.net>
> Subject: Re: Cutting sendmail out of the loop
>
> Johan:
>
> Actually, since the system I'm building is meant to be very secure and 
> appliance-like, it doesn't ever need to get mail "out of the system." And 
> it has limited memory, so it shouldn't be running a mail daemon. At most, 
> it needs a mail system that can ONLY mail locally, solely for the purpose 
> of satisfying programs that want to send users status via mail. (The mail 
> files will be trimmed by newsyslog, so they can't consume infinite 
> space.) Even the Dragonfly mail daemon would be overkill.

How about a simple _shell_script_ that simply finds the addressee
in the command-line parameters, and appends the content from stdin to
that addressee's mailbox?

If you want to get fancy, you add calls to lockfile to prevent potentially
intermixed output.