Monitor the warm-up ramp

A newly connected mailbox starts at 8 emails per day. Its allowed volume then compounds by about 15% each day until it reaches the mailbox’s configured daily limit.

Depending on that limit, the mailbox typically reaches full speed in roughly two to three weeks. A mailbox capped at 50 per day reaches full speed sooner than one capped at 200 per day.

Open the Inboxes page to see each mailbox’s warm-up progress as a percentage and today’s effective cap.

Respond when bounces pause the ramp

A day does not count toward the ramp when bounces push a mailbox’s health to degraded or critical. The countdown pauses instead of continuing through a bad day.

The Inboxes page shows Ramp paused — bounces detected beside the warm-up percentage. The ramp resumes counting when health recovers.

Set mailbox caps and sending windows

Configure these limits independently for every mailbox:

Daily limit: Set up to 200 emails per day for each mailbox.
Hourly limit: Set up to 50 emails per hour for each mailbox.
Sending window: Choose the days and hours when the mailbox can send. InboxJoy evaluates the window in that mailbox’s timezone.

A workspace-wide daily send cap also applies across every connected inbox combined. Configure it in Settings → Sending.

Rotate across several inboxes

When you connect multiple Gmail or Outlook inboxes, you multiply your daily capacity. When you enroll leads, InboxJoy spreads them across healthy inboxes in proportion to each inbox’s remaining daily capacity, including its warm-up limit.

Each lead keeps the same sender address for every follow-up in the sequence. Paused or unhealthy inboxes are skipped automatically.

Keep suppressed addresses from sending

InboxJoy checks every send against your workspace suppression list when the email goes out, not only at enrollment. If you add an enrolled lead’s address to the do-not-contact list, that address does not receive further sends.

Check bounce-related limits

InboxJoy calculates each mailbox’s bounce rate from recent sends. When the rate rises, InboxJoy cuts the effective daily limit automatically, independent of the configured daily limit.

Mailbox health	Trigger	Effective daily limit
Healthy	Bounce rate under 2%	Full configured daily limit
Degraded	Bounce rate 2% or higher, or repeated send failures	Cut to about half the daily limit
Critical	Bounce rate 5% or higher, or repeated permanent failures	Cut to zero until it recovers

InboxJoy calculates these limits automatically from delivery events. There is nothing to configure. Keeping your list clean is the most direct way to avoid a reduction. See Import leads.