Limits
Few and boring, on purpose. Volume is priced per plan; the technical limits below are about protecting the pipeline.
The numbers
| Limit | Self-hosted | Cloud |
|---|---|---|
| Message size | smtp_server.max_message_size (default 14 MB) | 14 MB |
| API pagination | per_page capped at 100 | Same |
| API bursts | None imposed by the software | Throttled per key; use the batch endpoints for spikes |
| Emails per month | Unlimited | Per plan; overage is billed per 1,000 |
Spikes belong in batches
If you send bursts (say, a queue worker draining), use the batch endpoints instead of hammering the single-send route:
POST /api/v2/server/messages/batchtakes an array of send requests and returns one result per entry.POST /api/v2/server/messages/with_template/batchapplies one template to many recipients/models.
Details in the messages reference.
Fair use
CamelMailer is built and priced for transactional mail. Bulk marketing violates the acceptable use policy on every plan, cloud or self-hosted.