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Overview Use policies and limits to scale volume while protecting reputation. Bulk policy
  • Apply policyKey when calling /api/v1/emails/send for campaigns/bulk.
  • If requireOneClick is active, one‑click unsubscribe must be configured.
Warmup & pacing
  • Warmup policies enforce progressive daily caps.
  • Token‑bucket pacing reserves a slot per org; rate limits prevent spikes.
Plan caps & usage
  • Monthly usage tracked per identity and organization; plan caps enforced.
Best practices
  • Start low; monitor complaint/bounce rates; raise gradually.
  • Keep transactional and marketing traffic separated by identity or IP.
Related
  • API: Send email (v1)
  • API: Rate limits