Zu viel SPAM

Vier Anleitungen für den Ubuntu Server, die SPAM weiter reduzieren könnten:

• Greylisting is a spam-reduction technique which can be very effective. 
• This guide explains how to install and integrate Sender Policy Framework (SPF) checking with Postfix.
• DomainKeys Identified Mail (DKIM) is a method for E-mail authentication, allowing a person who receives email to verify that the message actually comes from the domain that it claims to have come from.
• Amavis-new, ClamAV and SpamAssassin ...

Viel Erfolg!