You have probably already seen web hosters who allow you to rent
domains and receive email on these domains. Have you ever wondered how
they actually handle these thousands of domains? There is surely nobody
entering all these domains and aliases into a
Im folgenden wird Schritt für Schritt der Aufbau eines aktuell modernen (möglichst) sicheren Mailservers auf Basis von OpenSuSE 10 beschrieben. Bei Verdopplung des hier beschriebenen Systems und entsprechender Konfigurationsanpassung auf eine 2. Domain
What is Postfix? It is Wietse Venema's mailer that started life as an alternative to the widely-used Sendmail program. -=- Postfix attempts to be fast, easy to administer, and secure, while at the same time being sendmail compatible enough to not upset e
Some interesting ideas about blocking dialup, cable and dsl users by matching on their IP/hostname. Probably best to combine this method with selective greylisting.
Examples: m500.union01.nj.comcast.net
d5.GtokyoFL27.vectant.ne.jp
Regular e
When a spammer or worm sends mail with forged sender addresses, innocent sites are flooded with undeliverable mail notifications. This is called backscatter mail, and if your system is flooded then you will find out soon enough.
The postgrey package is a greylisting implementation for postfix. It is a breeze to set-up and stopped 99.99% of my spam in conjunction with blacklisting.