Warm-up and your health score

How a mailbox earns its reputation, and what the score means.

Help centre · Email outreach · Updated 8 October 2026

A new mailbox hasn't built a sending reputation yet, so sending a lot straight away can land you in spam. Warm-up sends a small, rising number of messages and keeps going in the background.

  • Health score. A score above 90% is good.
  • Warm-up. Click the flame beside a mailbox to pause or resume it.
  • Ramp. Which day of warm-up the mailbox is on.
  • Sent today. How many it has sent against its limit.

Click a row for the mailbox's settings. You can run a seed test to see where your emails land.