Quoth Ralph Zeller, on Fri, 23 Jul 2004 10:22:12 -0700:

> http://mutt.blackfish.org.uk/storage/

This document is illustrative.  I've learned from it, for one thing,
that the system spool file can be read directly as an "inbox folder" by
MUAs.  That blew my mind, since I had presumed the spool file is the
domain of the MTA alone.  (Postfix, I have noticed, will sometimes mv
that file and save an empty one in its place, temporarily; which seems
likely to trip up an MUA that happens to be reading it just then.)  But
this would obviate the need for a local POP server, which is good.

I'm also learning that, while the terms MUA, MDA, etc., are fairly
straightforward per se, their implementations don't always fit into any
one of those boxes.  It seems fetchmail and procmail, for example, are
not best thought of strictly as an MRA and an MDA, respectively, but
rather as general components in a "mail delivery chain".  If fetchmail
can pass emails to procmail (bypassing the "MTA"), then its relation to
procmail is that of an MTA.

Sorry if I've been a trifle loquacious.  As an end user, I don't find
these email systems all that simple; and as a Web developer, I find them
significantly more difficult than Web server software.  But I'm
learning.

--Jason V. C.

--
I finally beat the Internet.  The end guy is hard.
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