3 Post Office Questions

Hi,

I'm interested in purchasing Post Office, but I have 3 questions that
weren't answered by the various admin, user and install guides.

1) Is it possible to disable relaying except for users that authorize, and
then include them as a temp client for 10 minutes or whatever? I have a lot
of mobile users who check their e-mail from all over the place, and I'd like
them to be able to send mail through my server as well. Leaving it open and
blocking IPs on a case by case basis is not an option; my current mailserver
gets pinged by at least 10 different IPs a day looking to relay through it.
When I left my server open for a day accidentally, I got blacklisted by two
different organizations.

2) I'd like to install Post Office on my Xserve, which is 3000 miles away
from me. Is there a facility for remote install? It looks like the installer
is a GUI based installer rather than command line- I suppose I could mount
my server's hard drive in the Finder, and install onto that. Would that
work?

3) Is there a tier just a small step up from 100 users? I have nearly that
amount, and 
I'd like to run a server with room to grow to about 200 users in the next
few months, but I certainly don't need "1000s" of users (for which I am
directed to contact the sales dept. on the Post Office page).

Sorry for the multiple questions on my first post, but I have been fiddling
with Communigate for months, and was about to buy it when someone pointed me
at Post Office. From what I've seen, I'd much prefer the simplicity (and
price) of Post Office if the three questions above can be answered
satisfactorily.

Thanks,
-- 
Marc Siry
Interactive Creative Director
(212) 496-1398 voice
(917) 279-6731 mobile
marc@xxxxxxxx
466 Amsterdam Ave. #4B
New York, NY 10024
http://marcsiry.com/work/


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