Yesterday I wrote a short comment about the Spamhouse case. Spamhouse is indeed very important as an antispam blacklist. However, for my server I can only state that since I moved to it (previously my domains were hosted together with other domains on a server managed by a German hoster) greylisting works amazingly well for me. In fact I did not have a single spam mail through my domains since I use greylisting. And not that you think I do not get many attempts from spammers – the frequency is something like one mail per minute.
Greylisting, however, eliminated all spam to these domains from my mailbox. It seems my mail provider does not use greylisting. Is it that greylisting requires a second connection attempt and that the mail queues of my mail providers SMTP would simply be too small to bear the spam and legit mail server connection attempts? It would really be interesting. Continue reading →