This task can be performed using MailTester Ninja
Know which emails are real before you hit send, no credits needed
Verify emails before sending
Remove obvious syntax errors and duplicates, then run the list through bulk email verification that asks each receiving mail server whether the mailbox exists. Export results by status instead of treating every server response as conclusive.
To avoid credits, choose a verifier with flat, time-based pricing and no per-address allowance. Send to confirmed mailboxes, suppress invalid and disposable addresses, and review catch-all or unknown results separately because some servers intentionally hide mailbox status.
Best product for this task
MailTester Ninja
tech
Email verification that asks each mail server whether the mailbox is real, flags throwaway and catch-all addresses, stores nothing, and charges a flat weekly price.
What to expect from an ideal product
- Flat weekly pricing with no credit limits
- Mailbox checks against receiving mail servers
- Clear invalid, disposable, and catch-all flags
- No storage of submitted email addresses
- Bulk results separated by verification status
More about catch-all results
Treat catch-all addresses as unconfirmed, not valid. Protect email deliverability by testing a small segment first and monitoring bounces before using the rest of that domain.
- Keep catch-all addresses in a separate export.
- Start with a small, recent segment.
- Stop sending to that domain if hard bounces rise.
