Go to the «Mail / Mail domains» section.
Select the domain you need and click «Edit».
Check all the boxes for the listed options.
In the «Secure connection (SSL)» section, provide the following details:
1. Enter the full domain name in the «Alias for certificate» field.
2. Enter your email address in the «Email» field.
3. Click «OK».
Next, go to the «Main / Domain Names» section.
Click the «DNS Record» button.
For configuration, we will need «TXT» records.
Next, log in to your account and go to the «VPS Domain Management» section.
Go to the «Domains» section.
Select the domain name and click «Records».
Click «Create».
In the «Domain Names» section of the ISPmanager control panel, locate the first «TXT» record and click «Edit».
Copy the data from the «Name» field.
Paste it into the «Name» field.
In the «Type» field, select «TXT (Text Record)» from the dropdown menu.
Copy the data from the «Value» field.
Paste the copied record into the «Value» field and click «OK».
The record has been added.
Repeat the same process for the remaining two records.
The setup is complete.