How to disable Zimbra dnscache service
When you are using the Zimbra mail server behind NAT with Split DNS, you need to disable dnscache service. To
How to Zimbra Split DNS with dnsmasq
When you install Zimbra on a server behind NAT, your public IP is not configured in the server, instead, it
Fake SMTP Server for testing
When you develop a website or an application, you may need to use a fake SMTP server for debugging. Fake
How to configure Hostname in PowerMTA
By default, PowerMTA uses the server’s hostname. You can specify a custom hostname per Virtual MTA. To set a hostname
iRedMail Intentional policy rejection
On an iRedMail, when receiving an email from steam, the mail server rejects the email with the error message “Recipient
554 5.7.1 Unknown Sender in Local Domain
When sending an email from one server to another, the email gets bounced with an error The error is because
Google Workspace DKIM authentication settings failed.
When generating DKIM in google Google Workspace I got the following error message. This error happens when you have a
.forward file
Users can create a .forward file in their home directories that is used by mail servers like exim, sendmail used
postfix smtp Must issue a STARTTLS command first
When sending an email to a server, mail bounced with the following error message. To fix the error, first enabled
Mailwizz
Where MailWizz configuration file located?
Where Mailwizz configuration file located?
Mailwizz configuration file located at When you migrate a MailWizz installation, you need to update this file and change Database
How to find Zimbra version
To find the Zimbra version, log in to the server using SSH, then run the following commands. Switch to user