The original disposable email service. Regain power over your inbox from commercial forces, and catch them spamming.
Online Testseite um zu checken ob ein Mailserver als Relay agiert
Check out the top 5 most useful ruby gems that you may not have heard of!
I have found that this is the easiest combination that allows you to serve Virtual Domains, and Users. With this it's also very easy to implement webmail systems like SquirrelMail.
SMTP Testutility - Webinterface
Why SPF is not the best way to fight spam
deny mail to unknown vhost-users