Firewall and NAT

[Paul Howarth]

Neil Marjoram wrote:
> Can someone help me, this is driving me nuts!
> 
> I currently run sendmail on port 25, I have had a requirement to install
> smtp_auth, which all works fine. However I now find out that one of my
> users ISP's blocks port 25 so he can't access the mail anyway.
> 
> The answer? NAT port 10025 or what ever to port 25.

Whilst this doesn't answer your question, is there any particular reason you 
didn't just open port 587 in your firewall and use the MSA, which sendmail 
runs by default for this very purpose?

Paul.