Warmup not sending emails or volume is very low
If your warmup is enabled but you see very few or no emails being sent, check these common causes:
- Mailbox Connection — Go to your mailbox and verify the status shows 'Connected'. If it shows an error or 'Disconnected', reconnect the mailbox.
- Warmup Toggle — Make sure warmup is actually enabled for the mailbox (the toggle should be on).
- Early Ramp Phase — If your mailbox just started warmup, the system begins with only 1-3 emails per day and gradually increases over time. This is normal and by design. Check your ramp speed setting.
- Subscription Status — Warmup requires an active paid subscription. If your subscription expired or was cancelled, warmup is automatically paused.
- Daily Limit Already Reached — If you are running campaigns alongside warmup, the combined volume may have reached your daily plan limit. Check your daily usage in the mailbox details.
- Recovery Mode — If the system detected reputation issues, it may have auto-switched your mailbox to Recovery mode, which intentionally reduces volume. Check your warmup strategy in the mailbox settings.
- Health Score Below Threshold — If your health score is very low (critical range), the system may temporarily reduce sending to protect your domain.
If none of these apply, try disconnecting and reconnecting your mailbox, then re-enabling warmup.