This extension allows you to validate your customer’s email address. Keep your mailing lists free of invalid, risky and misspelled email addresses. This improves your IP reputation and delivery to the inbox. Head over to  ZeroBounce and sign up to get a 100 free trial credits!

Main Features:

• Email format validation.
  
• Validate if customer email account exists - before they've filled in the registration form. 
  
• Block certain domains – such as test.com or example.com.
  
• Ensure the email validation is non-obtrusive with time limits - If an email address is taking too long to validate, simply allow it to pass.
  
• Performance email validation with API caching - Saves you credits, if people attempt to enter the same bad email address multiple times.
  
• Email Alert if credits are becoming low - take action before they run out.
  
• Debug option to help diagnose any issues.
  

Zero Bounce optional advanced validation:

• Block free domains - Do you sell B2B products? Then you might want to block free domains from registering.
  
• Block catch-all - These email providers can’t be validated, so they are risky to send to. We recommend not blocking these, but you might want to.
  
• Known abusers or complainers - These emails are known for clicking the Spam button when receiving promotions and newsletters.
  
• Restrict newly created domains from registering - Most fraud is caused by newly registered domains.
  
• Block temporary and disposable email addresses - These emails are designed to only be valid for a few minutes, just to bypass your registration screens.
  

Read the OpenCart Blog about this extension.

This extension works really well with our Advanced Email Templates extension.