IPv6 Support & Relaying

Hi, I'm glad to announce we're now fully IPv6 enabled. This means every piece of software on this guide is IPv6 enabled.

The developer of Qsmtp added the capability for addipbl to work with IPv6.

I added the HOWTO to the relay part of the guide, with instructions on how to set everything up.

I also updated the Dovecot part to enable IPv6. I found it wasn't ready before.

Just a quick tip: if you're having trouble with tcprules try:

rm /usr/local/bin/tcprules

That way you'll use the one that comes with ucspi-tcp-ipv6 :)