Paranoid ar_mailer

Hi

I am using ar_,ailer and I love it. I am wondering though. Is there a
way
that it can be configured to not delete the emails, but rather just mark
them as sent.
We have a backgroundrb process that will be sending out notifications.
If
the server dies while in the process of sending them out it and
backgroundrb
starts up again, it could happen that it starts sending out
notifications
that have already been sent.

I can log the last time that a user was notified and check that before
sending emails, but I was wondering if this functionality exists in
ar_mailer so that the backgroundrb process can just check if the mail it
wants to send exists in the emails table before sending it.

Why are there so few posts etc. about ar_mailer out there?

Ivor