Block form or pop-up form submissions from specific email domains

You can prevent visitors with email addresses containing specific domains from submitting your HubSpot form or pop-up form. To further protect your forms from spam submissions, learn how to enable CAPTCHA on your forms. 

Block email domains on a form

To block email domains on a HubSpot form: 

• In your HubSpot account, navigate to Marketing > Lead Capture > Forms.
• Hover over a form and click Edit. 
• In the form editor, hover over the Email field and click the edit edit icon.
• Enter the domains you want to block in the Email domains to block field, separated by commas. Enter only the root domain without the www prefix or @ symbol. For example, enter gmail.com, not www.gmail.com or @gmail.com.
• Select the Block free email providers checkbox to block HubSpot's default list of free domains, this is optional.
• In the top right, click Update or Publish. When a visitor attempts to enter a blocked domain in the Email field on your form, they will see a message asking them to enter a business email address.
  
  

Block email domains on a pop-up form

To block email domains on a pop-up form: 

• In your HubSpot account, navigate to Marketing > Lead Capture > Forms.
• Hover over a form and click Edit. 
• Click the Form tab.
• In the left pane, under the Added fields section, click the edit pencil icon next to the Email field.
  
  

• Enter the domains you want to block in the Email domains to block field, separated by commas. Enter only the root domain without the www prefix or @ symbol. For example, enter gmail.com, not www.gmail.com or @gmail.com.
• Select the Block free email providers checkbox to block HubSpot's default list of free domains, this is optional.
• Finish setting up your pop-up form. When a visitor attempts to enter a blocked domain in the Email field on your pop-up form, they will see a message asking them to enter a business email address.