This tutorial assumes that you've already logged into your Reseller Admin section
Now let's learn how we can add a user's domain or email to the Blacklist
1) Scroll over Settings...
2) ...then scroll over Blacklist
3) Click Domains In Blacklist
Once you have added a domain or email to the blacklist your users will get an error while adding it
Scroll down
4) Enter the full domain name here
Note: You may also add a domain name with a wildcard like '*.domain.com'
5) When finished click Add
It is also possible to Import and Export a file with the blacklisted domain names
Let's check the Blacklist for Emails. It can configured just the same way as Domains Blacklist
Here you may add/import emails to the blacklist and specify either a full email address or an email with a wildcard like '@domain.com'
This is the end of the tutorial. You now know how to add users' domains and emails to the blacklist so that no abusers may appear in your system