I bet it would be a lot more effective to automatically open accounts with that port 25 blocked. If you want to use it, you give them a call and ask for it to be opened. I bet at least 95% of the spam being created is being created without the user knowing so closing port 25 won't affect them.
But people dedicate a lot of time to finding these exploits. It's similar to the Windows/Linux arguement. Windows has a lot more security holes, but it also has A LOT more users to find these holes. If 90% of internet uses suddenly started using FireFox, I bet holes would be found in it as well.
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I bet it would be a lot more effective to automatically open accounts with that port 25 blocked. If you want to use it, you give them a call and ask for it to be opened. I bet at least 95% of the spam being created is being created without the user knowing so closing port 25 won't affect them.
But people dedicate a lot of time to finding these exploits. It's similar to the Windows/Linux arguement. Windows has a lot more security holes, but it also has A LOT more users to find these holes. If 90% of internet uses suddenly started using FireFox, I bet holes would be found in it as well.