1

On exchange 2003 I want to listen for smtp on port 25 only so that * anonymous login is only allowed from certain internal IPs * authenticated login is allowed from everywhere

I can't see how to do this. Any IP filtering seems to affect both anonymous and authenticated login in the same way. Any ideas?

1 Answer 1

1

unfortunately that isn't possible. But you could create a second virtual SMTP server, just not using the same port and local IP. You'd need to either use a different SMTP port instead of 25 or bind the two virtual SMTP servers to different local network cards / IPs.

1
  • Thanks! Good to know that. I'm using port 587 now for authenticated users with the down side of more configuration effort on clients but it has the advantage that I can IP-filter port 25 on the real firewall instead of fooling around on this exchange box.
    – rudimeier
    May 12, 2015 at 21:50

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.