ISPmail Bookworm

Success stories

I would appreciate if you leave a comment here telling others if your mail server is running. Perhaps even a word about the purpose of the mail server and the number of users you have. That allows others to see that their time is well-spent and indeed leads to a working mail server. Thanks for …

Success stories Read More »

Monitoring and backup

You have come a long way. Glad you made it. So many weird things complicated the journey that evolved from the very beginning of using email roughly 35 years ago. But before you take your much deserved break from these adventures let’s take care of some final tasks. Monitoring For me there is nothing more …

Monitoring and backup Read More »

FAQ (frequently asked questions)

Can I use this guide for my own work? Previously I claimed a copyright on the documentation. However let’s make things simpler. This Bullseye guide is using the Creative Commons BY-NC-SA license. Which means: Besides that this guide has been a team effort. Many readers have contributed to it. I may spend the time to …

FAQ (frequently asked questions) Read More »

Prevent spoofing using DKIM

Email sender spoofing is the act of pretending to be in control of someone else’s email address. This is a common problem with phishing. Often scammers send emails with a sender address of something@paypal.com and hope that the recipient falls for it and trusts them. In fact SMTP does not care which sender address you …

Prevent spoofing using DKIM Read More »

Setting DNS records

MX entries So now you have your working mail server. But how do other mail servers get to know you? The answer lies in the most important service on the internet: DNS – the Domain Name System. Assume that a mail server somewhere on the other end of the internet wants to send an email …

Setting DNS records Read More »

Catching spam with rspamd

You have come a long way in this guide and your mail server is already fully functional. Now it’s time to deal with the dark side: spam. And there will be lots of it. So we need to detect spam emails and filter them out. I found that rspamd is a well-performing choice for that …

Catching spam with rspamd Read More »

Testing email delivery

So far you have spent considerable time with theory and configuration. Are you worried whether all you did actually leads to a working mail server? Before we do the final steps let’s take a break and verify that everything you did so far works as expected. At this point the /var/vmail directory should be empty or maybe contain …

Testing email delivery Read More »

Scroll to Top