Postfix and local mail redirection

[Sad Clouds <cryintothebluesky%gmail.com@localhost>]

Does anyone who uses Postfix perform local mail redirection to a
central mail hub? If yes, can you suggest what settings you use?

Specifically, I'm interested in this scenario:

By default each NetBSD install is configured to deliver local mail
to /var/mail. Most of it is daily/weekly scripts, uptime and
performance metrics, etc. I would like to change that and instead
redirect all local mail from multiple machines to a central mail hub.

There is a specific account, e.g. admin%example.com@localhost which receives such
mail and monitors any issues on a daily basis. The problem is, sending
mail to this account requires SASL authentication. I've been looking at
Postfix SASL documentation and it looks like it may be possible to make
it work with "smtp_sasl_password_maps = ..." in main.cf.

Has anyone done this before? Is this a good way to consolidate local
mail from different machines or is there something better? I was
thinking of copying logs via ssh to a central storage, but email may
work better with multiple admin people monitoring from different
devices, e.g. laptop, desktop, phone, etc. All that is required is an
IMAP client on each device.

PS. I'm not subscribed to this list, please CC me if you decide to
reply.