"Perry E. Metzger" writes:

> 2) I originally proposed (in another context) a script that read an
> /etc/mailer.conf file, but someone accurately said "why do that when a 
> link will do" and I now agree with them.

There might be reasons not to use a script, but on the face of it it
seems like it might be worthwhile.  An advantage of a configuration
file and script is that "everything would be kept in one place", there
would be no possibility of having stale links to the wrong files, and
changing mailers would require a single small change.

You could arrange it so that choosing the mailer was down to the
setting of a single symlink (to a directory), but I'm not sure that
was the suggestion, or that it's worth doing that instead of using
scripts.