Postfix/Rejecting_mail_to_the_hostname
From http://archives.neohapsis.com/archives/postfix/2009-05/0808.html
> Now the problem is that if a spammer sends email directly to > wmoliver@eul0001189.eu.verio.net it bypasses the third party spam filter > and gets delivered. This has been happening. Then don' use eul0001189.eu.verio.net as myhostname/mydestination, but: eul0001189.eu.verio.net.invalid and in virtual use: oliver@gtwm.co.uk wmoliver@eul0001189.eu.verio.net.invalid