dmarcian

dmarcian focuses on DMARC visibility, source identification, policy progression, and partner programs. The product is mature and purpose-built, with clear published limits by domain count, message volume, data history, and user count.

An agent stack treats email as a two-way primitive. Inbound has to arrive as structured JSON a tool call can consume, sends have to be safe to retry when a model loop repeats itself, and every action needs an audit trail. A provider without inbound parsing only solves half the problem.

Against inbound parsing into tool calls and model-generated sends that must not duplicate, dmarcian covers event stream and multi-tenant support, and does not cover inbound parsing, idempotency keys, webhook coverage, batch sending, and SDK breadth. Whether that gap matters depends on how central those are to the build.

• Inbound parsing: No
• Idempotency keys: No
• Webhooks: No
• Operating since: Not published
• Event stream: Yes
• Best published rate per 1,000: Tiers not published in comparable form
• Batch sending: No
• SDKs: None
• Multi-tenant: Yes

Not a sender. Helps domain owners identify aligned and unaligned sources, monitor DMARC-capable volume, and move policy safely toward quarantine or reject.

Organizations that want a focused DMARC platform with a clear path from monitoring to enforcement.

Small businesses looking for a generous free commercial DMARC monitor.