Log in to your SolidCP. panel
Click on Accounts in POP/IMAP Email category:
Click on Create Mail Account:
Enter an email address you wish to create, example: name@domain.tld:
In dropdown menu select the domain you wish to use, after that write your password and confirm it. Also, you can now set the mailbox quota.
You can also enter your other info like first name, last name, etc.
If you want, you can now set up any forwarders and autoresponders.
Click on Save and you created your email address.