[Pkg-exim4-users] Problems concerning IPv6 Port 25's opening to the Internet

[Marc Haber]

On Sun, Oct 28, 2012 at 03:54:38AM +0900, Satoru Otsubo wrote:
>  Why is Port 25 shown as "filtered" ?

Many ISPs filter tcp/25 to protect the internet from their users' open
relays. Use tcpdump to check whether your connections from outside
come through.

By the way, what does HGW mean?

Greetings
Marc


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