Safe Sending Volume Calculator
Account send caps are not safe cold-email volumes. The inbox-safe number is far lower, and the way to scale is more sending inboxes at a low per-inbox volume, not one inbox sending thousands.
Safe daily volume
200 /day
Total across all inboxes, kept low per inbox.
Monthly volume
4,400 /mo
Business days only.
To send more
Add inboxes
Scale with more inboxes and domains, not higher per-inbox volume.
How it works
Multiply your number of warmed sending inboxes by a conservative per-inbox daily volume (30 to 50 for cold outreach on a warmed inbox). The result is your safe daily ceiling; the monthly figure assumes sending on business days only. Scale by adding inboxes and domains, never by raising per-inbox volume past the safe range.
Make these numbers real.
Scheduler Zero handles warmup, authentication, and reputation so your deliverability stays high and your funnel math actually holds up.