ISPmail Bookworm

This is the pretty boring but at the same time very important part of the tutorial. Do not skip it. Most problems that readers have with their mail servers are caused by a misunderstanding of the different types of email domains. There is nothing you need to do on your server right now. Just lean back […]

The mail server that you are about to set up uses several software components. Let me first explain briefly what the purpose of each software is: What happens when someone sends you an email? Let us assume that you are responsible for the email domain example.org and someone on the internet sends an email to john@example.org.

Upgrade or fresh installation? I recommend that you set up a new server and make sure that the new mail server is working correctly before you start migrating existing email users to it. You may argue that Debian can be upgraded easily using “apt-get dist-upgrade” but that is very dangerous on a live mail server.

I try to keep as many parts of the setup unchanged. Many of us are happy with their mail servers and want to change as little as possible. Email is a boring matter anyway and we do our jobs best if our users don’t even realize that we are there. A few things though that

Once upon a time there were many mail servers on the internet. If your organisation wanted to receive and send emails then you would have your system administrator set up a mail server. He would add a DNS record and create a cryptic Sendmail configuration file. Fast forward a few decades and suddenly we have