You can disable either or both services from your Control Panel.
To disable Web Service
1. Login to your control panel 2. Go to Websites & Domains 3. Locate the domain which you wish to manage 4. Click Hosting Settings 5. In Hosting Type options, Select No web hosting 6. Click OK
To disable Mail Service
1. Login to your control panel 2. Go to Mail 3. Click Mail Settings 4. Click on the Domain which you wish to manage 5. You can disable the mail service on this domain by unchecking Activate mail service on this domain option 6. Click OK