Email Verification
Clean lists = more revenue. Period.
Every bounced email hurts your sender score, tanks your deliverability, and wastes money. MailerSpark catches bad addresses before they cause damage.
Verification Results
94.6% deliverability score
The Difference Is Dramatic
See what verification does to your numbers
Without Verification
With MailerSpark Verification
Real-time Check
Email Address
user@example.com
Result: Valid — Safe to Send
Real-Time Verification
Catch bad emails before they enter your list
Verify addresses instantly as they hit your signup forms. Block disposable and invalid emails at the point of capture — before they pollute your data.
- Verify emails in under 1 second
- Integrate with signup forms and landing pages
- Block disposable and temporary emails
- Simple REST API with full documentation
Bulk Verification
Clean your entire list in minutes, not days
Upload up to 1 million emails per batch. Get a detailed, downloadable report with actionable results — valid, invalid, risky, and disposable.
- Verify up to 1M emails per upload
- Upload CSV or paste addresses directly
- Detailed downloadable reports
- Automatic duplicate removal
Bulk Upload
Drop your CSV file here
or click to browse
7,500 / 10,000 emails verified
How It Works
Four layers of verification. One clean list.
Every email passes through four checks before it reaches your list — so you only send to real, active inboxes.
Syntax Check
Catch typos and formatting errors instantly.
Domain Check
Verify the domain exists and accepts mail.
Mailbox Check
Confirm the mailbox is active and accepting.
Risk Assessment
Detect disposable, role-based, and catch-all addresses.