How to use monit to automatically restart Usermin on port 20000 if it fails
What is Monit? Monit is a free and open-source process monitoring utility for Unix and Linux systems. It provides a way to monitor various aspects
How to deal with “Reverse DNS does not match SMTP Banner” on a Virtualmin Postfix server
On a newly installed control panel you might have this situation: Hostname: example.ispdomain.com Client domain: example.com This might cause problems with MX Toolbox’s health check
SRS – a beautiful technology which means you can forward your emails to Google
Background Do you suffer from the problem that you want your emails forwarded to Google but they always end up in SPAM because of SPF
How to convert an Office 365 mailbox to a shared mailbox
Also known as: What to do when an employee leaves and you want to keep their email but you don’t want to pay for a
How to troubleshoot email via Gmail’s ‘Show original’ menu
Troubleshooting email is very interesting because often two emails problems are not the same. One of the most powerful tools in the email system administrator’s
IMAP or POP3: What’s the Difference? Which Should You use?
Overview When it comes to setting up the email address that you host with us on your devices, you will have two protocols to choose
Postfix reports server-name postfix/trivial-rewrite[1652032]: warning: do not list domain server-name.example.com in BOTH mydestination and virtual_alias_domains
On your stock email server you might see the following message repeatedly in the log file: Aug 20 08:55:18 server-name postfix/trivial-rewrite[1652032]: warning: do not list
Dovecot IMAP Login Process Limit Reached
Problem Description On a busy Dovecot email server you might encounter the following serious problem in the log file: tail -f /var/log/mail.log | egrep -i
How to set a good defaults for DMARC records on a Virtualmin server with many domains
Background If you’ve got a perfect Virtualmin setup, you might notice that MX Toolboxes’s Email Health checker complains about DMARC. Next you might wonder what
How to deal with “Helo command rejected: ACCESS DENIED” on a Postfix / Kopano email server
On a Postfix email server with paranoid HELO security your clients might contact you because they are not getting email. Upon examining the email log