Blacklist particular domain in webmail account

Step 1: Login to your webmail account using the URL : http://webmail.oryon.net
Step 2: Your email account name appear on top of the screen.
Step 3: Click your email account name.
Step 4: Click Settings option.
Step 5: To blacklist a particular IP or domain name, click Spam Settings option.
Step 6: Under Blacklisted Domains and Email Address box, click Add option, enter the Domain name or IP address that would need to blacklist under webmail account.
Step 7: Finally click Save option.