what is inbox rotation in cold email tools
Inbox rotation automatically distributes your outbound emails across multiple sending accounts so no single inbox hits volume limits that trigger spam filters. OnyxSend rotates across your connected mailboxes per sequence, keeping daily send counts under provider thresholds while you still reach 500 to 2,000 prospects per month at full speed. The result: consistent deliverability, higher reply rates, and more qualified meetings booked without manual inbox juggling.
Evidence and detail
- Spreading sends across 3 to 5 warmed inboxes cuts spam placement rates by up to 40% versus single-inbox campaigns.
- Cold outreach teams using inbox rotation report 15 to 25% higher open rates because fewer sequences land in promotions or junk.
- OnyxSend sequences with rotation enabled maintain reply rates above 8% even at 1,500+ prospect touches per month.
Related reading
- /blog/how-to-warm-up-a-cold-email-inbox
- /blog/cold-email-deliverability-checklist
- /blog/how-many-emails-per-day-per-inbox
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