Cleaning up an email list? Our Email Malformed Checker helps you identify invalid and malformed email addresses instantly. Paste a list of emails, and we'll separate the good from the bad.

1. Paste Emails

Enter your list of email addresses in the text box. One email per line.

2. Check

Click "Check Emails". The tool analyzes each address for syntax errors.

3. Review Results

• Valid Emails: Correctly formatted addresses.
• Invalid Emails: Addresses with errors (missing @, invalid characters, typos).
• Reason: We tell you why an email is invalid (e.g., "Missing domain", "Invalid TLD").

• Typos: Like [email protected] instead of gmail.com (checks for common TLD patterns).
• Syntax: Missing @ symbols, spaces in addresses, double dots.
• Structure: Missing domain extensions (like .com or .net).
• Characters: Invalid characters that aren't allowed in email addresses.

• Reduce Bounce Rates: Sending to invalid emails hurts your sender reputation.
• Clean Data: Keep your user database accurate and useful.
• Save Money: Don't pay for marketing emails sent to non-existent addresses.

This tool performs syntax validation. It checks if the email address follows standard formatting rules (RFC 5322). It does not send an email to verify if the inbox actually exists, but it catches almost all formatting errors and typos.