21 Mar
2001
21 Mar
'01
22:32
No no, that's not the point. I could do that. But I thought that other mailservers (for example yours) is talking to my mailserver on that port 25. Isn't that right? So if I block that port, I won't receive any mails any more!
Depends on your mail setup. SMTP AUTH is not designed to secure server to server transactions (but it can, you just have to share keys/etc somehow, same problem IPSec is facing). It is meant to secure client to server connections (where they have a shared secret, i.e. username/password), and depending on your mail setup you may want to block port 25.
Raffy
-Kurt