Sending limits
| Limit | Value |
|---|---|
| Max recipients per message | 100 |
| Max attachment size (total per message) | 10 MB |
| Bulk messages (recommended max per request) | 50 |
For high-volume sends, use the bulk messages endpoint rather than looping over individual
/messages calls. Paubox recommends batches of 50 or fewer messages per request.429 Too Many Requests response, back off and retry. See Errors for retry guidance.
What to do if you’ve reached your limit
You will be charged a small amount per-email for each email that you send beyond the limit of your current plan. Any overage charges will appear on an invoice of the month after any over-limit sending occurs.Paubox Email API overage costs
If you go over your plan limits, here’s a breakdown of the overage costs you’ll incur:| Plan Information | Monthly Plan Limits | Cost Per Extra Email |
|---|---|---|
| Free | 300 | - |
| Pro | 10,000 emails | $0.0130 |
| Pro | 30,000 emails | $0.0130 |
| Pro | 50,000 emails | $0.0100 |
| Pro | 100,000 emails | $0.0098 |
| Pro | Custom | - |