How to Send Notification to all Users with DirectAdmin?
As their reseller host, there are numerous situations in which you would need to provide your clients with important information. You can use DirectAdmin to send a notification to all users at once, saving you the trouble of sending them individual messages or using other email solutions.
To Send Notification to all Users
1. Log in to your reseller account of DirectAdmin.
2. Go to the Reseller Tools section and click on Message All Users.

A panel will appear where you can set the message urgency and space for the message content.
3. Select the priority of the notification from the dropdown list.
4. Enter the Subject and the Message you want to send your users and click SEND.

Note
You can choose to send the notification to only the users’ emails and not to their DirectAdmin accounts. For that, tick the E-mail only in the To: field.
The DirectAdmin will send your message notifying all your users at once.