Paubox · Rate Limits
Paubox Rate Limits
Paubox publishes hard sending limits (recipients, attachment size, batch size) and plan quotas with overage pricing, but does NOT publish a numeric request rate limit and does NOT document any rate-limit response header. An agent gets no runtime pacing signal — only the 429 itself.
Paubox Rate Limits is the rate-limit profile for Paubox on the APIs.io network — every limit transcribed verbatim from the provider’s own documentation on 2026-08-26.
| It captures 3 rate-limit definitions, including Max recipients per message — | Max recipients per message | 100 | ; Max attachment size per message — | Max attachment size (total per message) | 50 MB | ; Recommended bulk batch size — Paubox recommends batches of 50 or fewer messages per request.. |
Limit state is signalled in the documented, ratelimit_headers, retry_after, and note response headers.
Tagged areas include Email, HIPAA, Healthcare, Compliance, and Transactional Email.
3 Limits
documentedratelimit_headersretry_afternote
Transcribed from the provider's documentation on 2026-08-26 — docs.paubox.com/email-api/limits.md.
View Source
EmailHIPAAHealthcareComplianceTransactional EmailEmail MarketingFormsSecurityEncryptionMessagingA2A
Limits
Max recipients per message per-request
| Max recipients per message | 100 |
100
Max attachment size per message per-request
| Max attachment size (total per message) | 50 MB |
50
Recommended bulk batch size per-request
Paubox recommends batches of 50 or fewer messages per request.
50
Published as a provider recommendation, not a hard cap.
Work with this as data
Every rate limit here is available over the APIs.io API and to AI agents over MCP.