Is that 5GB of bandwidth calculated to handle those hundreds of ingoing/outgoing emails a day? Even if it isn't, we have two plans: one just under that bandwidth requirement, and one that's 3.5 GB over. The Living Media's Windows-Emerald plan looks like it would be a good fit:

http://www.thelivingmedia.com/busine...plan_detail_2/
275 MB space
8.5 GB bandwidth
PHP, Perl (CGI), ASP
Windows 2003 hosting
SQL and MySQL databases
POP3
$13.95 a month

If ASP isn't a solid requirement, our Linux-Emerald plan gives you the same amount of disk space and bandwidth for a lower monthly fee:
http://www.thelivingmedia.com/busine...plan_detail_2/
275 MB disk space
8.5 GB bandwidth
PHP and Perl (CGI)
$11.45 a month

You can also check out our Amethyst plans (4 GB of bandwidth each) if you prefer a lower the monthly price. There is a discount for longer contracts, but we also give pro-rated refunds: if you sign up for a year, and decide to cancel at month 7, you get months 8-12 refunded to you.

We are highly reliable (99.873% uptime for all of 2005, according to Alertra), and our clients are very satisfied with our support and service.