NioLeadsThe Email Verifier
You Can Finally Trust
Achieve less than 5% bounce rates and enhance your email marketing ROI by using NioLeads' precise email verifier to instantly validate single or bulk emails, optimize your lists, and protect your domain reputation for more effective outreach.
Trusted by over 2000 leading companies worldwide
Bulk Email Verifier
Simply upload your data in CSV format, and you can export all records along with their email validation results or download only those with deliverable, catch-all, or undeliverable email statuses.
Smart & Powerful
Uniquely deep verification, we work with the industry's top email verification service provider to maximize deliverability and engagement.
Highest Accuracy
Bounce rate < 5%, NioLeads email verification process checks each address against multiple email verification processors, ensuring that it is valid, invalid, or not associated with spam traps.
GDPR compliant
NioLeads is GDPR compliant to encrypts and protects your data during the email verification process.
NioLeads Email Verifier Result
Valid
The email validator received confirmation of the existence of the email address from the mail server.
Accept All
An accept-all (also known as catch-all) domain, can't verify if your email is deliverable or not.
Invalid
Your email address is incorrect.
Unknown
The receiving mail server did not respond.
How NioLeads verify email addresses
Enhance your email delivery rates with our 12-step verification process, ensuring over 97% deliverability. Click "send" confidently, knowing your emails will reach recipients seamlessly.
Email Syntax Verification
Validate email addresses according to IETF standards.
Disposable Email Detection
Detect temporary email addresses that are created for one-time use.
Free Email Validator
Check if the email address uses well-known free email services like Gmail, Hotmail, AOL, etc.
Domain Health Check
Check and verify the domain name of each email address
MX Record Checker
Verify the MX records of available mail exchange servers to check if the domain's MX records exist.
Mailbox Existence Check
Perform deep SMTP verification. Checks whether the mailbox exists.
Catch-all Email Checker
Detects and flags the domain which accepts any email (wildcard) on their domain.
Greylist Verification
If the mail server uses greylisting techniques, we will retry the email verification.