Host your own mail or outside?
I have something of a conundrum. And it's got to do with cost and static IPs.
I currently have two campuses that I have to manage. One has a 512k Uncapped connection shared between about 40 people and two labs and the other has a 384k capped (3GB transfer allowed per month) line shared between about 30 people and one lab.
With the 512k uncapped account I get 5 static IP addresses of which I use two - one for my mail server breakout and one for my proxy server breakout.
As things stand, the internet is (as you'd imagine) helluva slow when people are using it. I can upgrade both sites to a 4Mb uncapped connection for the same price as what I'm paying now. BUT I lose the static IPs.
Now, I have a dedicated server that I could host our mail server on and I could easily run the proxy (squid) through a normal 4Mb connection.
What would your advice be? Do I:
a) Host my own mail server and stick with 512k
b) Host an internal mail server, forward it to my Dedicated server and move to 4Mb
c) Try to find some ISP that provides a static IP and mix both solutions
tl/dr: Choose A, B or C.