> > > That wont stop them from submitting on port 25. That will stop them > from relaying through port 25. So this wont "isolate viruses", as the > virus can still run rampant through your own user base. > > Really. This isn't an anti-virus solution. It's an anti-relaying > solution.
John I haven't gone back and looked at Perkel's OP. Just cause you knock on port 25 doesn't mean the email is accepted. I think we are arguing terminology here now. In general we do not accept and keep anything on 25 that isn't looked over and allowed. i.e. we smtp reject that which we do not allow. So, then comes up the difference between port 25 relay or not. i.e. local or not. Non local email must be relayed somehow. I think you are correct about relay issue yet not about how port 25 must be engineered and implemented vrs other smtp port possibilities. - rh
