We can unsuspend the domain from the Plesk panel as well as from the shell,the shell is more secure and easiest way to unsuspend the server.Login in to the shell as root user and run the following command.
[root@server bin]# /usr/local/psa/bin/domain -u linux.com -status enabled
SUCCESS: Update of domain ‘linux.com’ completed.
In above example, we have unsuspended the linux.com domain.
