You are using Email to Case Premium and would like to prevent inbound emails from specific email addresses (spam addresses) from creating cases in your Salesforce Org.

Out of the box, Email to Case Premium will never intentionally prevent an email from being successfully processed and creating a case. That said, there are a couple of different ways to approach this type of situation.

1. The most practical solution we suggest is to reach out to your IT / Email Administrator and ask them to prevent emails from forwarding into Salesforce for the specific problematic addresses.

2. As a Salesforce Administrator, you may consider taking the route of creating a validation rule to prevent case creation.

To create a validation rule to handle this situation, please follow the steps outlined below.

• Navigate to Setup > Customize > Cases > Validation Rules.
• Click the New button and specify a name for your new rule, such as "Blocked Email Addresses".
• Specify a Description (Optional).
• For the Error Condition Formula, specify SuppliedEmail = 'Enter the Problematic Address Here"
  • For multiple addresses, simply add a comma after the first address and specify each additional address in single quotes.
• Specify an Error Message for when the email is blocked from being processed. An email with the error will be sent to the Error Routing Address specified under Setup > Develop > Email Services > Email to Case Premium.
• Click Save and you're all set. The final rule should look similar to the following screenshot.