🛑 Free Tool
Email Bounce Checker
Instantly check if an email address will bounce before you send. Protect your sender reputation by removing invalid emails.
How the Email Bounce Checker Works
Our email bounce checker simulates sending an email to the address. It talks to the receiving SMTP server and asks if the mailbox exists, without actually sending a message. If the server says no, the email is flagged as a bounce.
✅ Key Features
- SMTP Validation
- Domain Checking
- Syntax Validation
- Instant Results
Frequently Asked Questions
Is this tool really free?
Yes, you can check individual emails for bounces completely free. For bulk checking, you can create a free account to get 100 credits.
Does checking the bounce send an email?
No. Our tool uses SMTP connection simulation. We connect to the mail server, verify the mailbox exists, and disconnect before any email is sent.
Need higher volume?
Unlock bulk processing, API access, and advanced AI confidence scoring with a free ZeroBounce AI account.