BTOpenworld have clamped down on its users who are running a mail server on their dialup networks. No longer can you receive smtp email if you are dialed up with BT – bet that breaks a few peoples servers. They claim this is to stop peoples servers from being a relay, but if you are clever enough to install a mail server, I would hope they are clever enough to stop relaying on the mail server (and I’d imagine clever enough to change the port from port25 to something else!) Having said that – someone I work with has installed a mail server on the internet and then reckoned the blacklist warning email they received from MAPS (or similar) was a spam mail to get some business and therefore ignored it!