The new kid on the block with their opaque error messages in so called “spam protection” is Cisco Talos Piece of Shit Intelligence. If you
Synopsis Client’s Virtualmin server failing perpetually with: dsn=5.1.1, status=bounced (User unknown in virtual alias table) Client mucked about with the standard config. mc -e /etc/postfix/virtual
At times, Postfix may crash with many errors in the log file, for example: 2025-07-15T12:59:50.620961+02:00 server postfix/smtpd[2243195]: warning: problem talking to server 127.0.0.1:10023: Connection refused
The WHM transfer tool is incredibly powerful. It allows one to easily migrate a domain between two servers, with zero downtime and including DNS updates.
Microsoft just took over your PC with new Outlook. Now outgoing is failing. You’re using cPanel. Here are some of the errors: We couldn’t deliver
This morning an old established client tell me he has been getting certificate warnings, and lately a lot of problems sending email. After some time
You might see these repeating messages on a newly perfectly installed Virtualmin server: Jun 1 06:44:36 host postfix/smtp[104754]: warning: reason: dnssec_probe ‘ns:.’ received a response
Introduction Writing a quick start article for an anti-spam gateway is not trivial. The fact of the matter is everyone’s idea on how to use
Welcome to old operating system support! In today’s edition you’ll find older operating systems don’t work properly with modern and secure and up to date
Let’s Encrypt expirations can be a nightmare on unautomated systems. When it goes wrong on an automated systems it’s even worse. The bot will try
