all about networking
Reading Time: 4 minutes 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 … Read more
Reading Time: 4 minutes In this post, I would like to show, how to use DKIM together with postfix to enhance the chance, that mails send by your mail server are not marked as spam at the receiver. In my last post, I showed how to set up postfix in front of scalix to filter incoming mails. As also … Read more
Reading Time: 4 minutes In this post I would like to show, how to set up Postfix and Dovecot in front of Scalix on a Debian system, for security and mail filter reasons. I assume, that you have a running Scalix installation and full management access. If you need help to install Scalix on Debian, you can use my last … Read more
Reading Time: 4 minutes 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. If you … Read more
Reading Time: 4 minutes 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 … Read more
Reading Time: 5 minutes 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 … Read more
Reading Time: 4 minutes Over the last weeks I got the idea to set up my own server. I did this years before, during my study time but when starting to work I was too busy to maintain my server. Now, I regret this and would like to bring this blog to my own server. While doing this, I … Read more