In this post I would like to explain the usage of SPF (Sender Policy Framework), which could be used to prevent spam. SPF will use the DNS system to tell the receiving mail server, whether the sending server is allowed to send mails for this domain. As this is the basic concept, I will explain […]
Posts tagged Postfix
How To: Postfix with TLS
This time I would like to show, how to secure the connection between postfix and the client with the help of a certificate by using postfix with TLS support. You can use your own certificate authority for that or a public one. I will use StartSSL to create my certificate and use postfix with TLS. […]
How To: Scalix, Fight Against Spam wi...
This post will describe how to fight against spam on a Scalix system with the help of Postfix. I assume you replaced the Scalix SMTPD with Postfix, as described in this post: How To: Replace Scalix SMTPD with Postfix As the picture above indicates, sometimes, spam could be a good idea, but when talking about […]
How To: Replace Scalix SMTPD with Pos...
In this post I will describe how to replace Scalix SMTPD with Postfix to use the flexibility of Postfix for Spam and Virus fighting.You should read my installation instructions before starting the steps below. You can find the installation instructions for Scalix on a Debian with Postfix here: How to: Install Scalix on Debian using […]