Change of email system - free options?
We currently have a free LEA provided email system, desknow, but as we have exceeded our 3GB mailbox limit we are going to be charged £360 per annum and another £60 per Gig.
Now I know that that isn't too bad when you compare it to buying and installing an exchange server and adding all the spam/filtering to it BUT I have been informed that we have no money for this sort of thing and I need to find a free alternative!
Now we are a small secondary with about 150 staff who do not use the email that much at the moment as there has been no policy in place to ensure that they are using it, which I intend to change.
Can anyone suggest which way I could go with this?
Google mail for schools, Zimbra or something else?