Email Send Time Optimizer
Pick your audience type and time zone to get recommended send windows. Advanced mode tailors the ranking by industry and how spread out your audience's time zones are.
Research-backed starting windows — always A/B test against your own audience.
How it works
- 1Choose your audience type (B2B or B2C) and primary time zone.
- 2Advanced: pick an industry and how spread your audience's time zones are.
- 3Get ranked day-and-time windows to test first.
Frequently asked
Is there one best time to send?
No single time wins for everyone — these are research-backed starting windows. Always A/B test against your own audience, since engagement data beats any benchmark.
Does send time matter more than the list?
No. Timing is a tuning lever; reaching real, verified inboxes is the foundation. Optimize send time after your list and authentication are solid.
Can I check a whole list at once?
This free tool checks one at a time. To verify a full list — email, phone and company together — upload a CSV to BounceBlock and preview your first 100 rows free.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.