SMTP.com

SMTP.com is a long-running SMTP relay and transactional email delivery provider now associated with Ziff Davis. It is relevant to the provider universe because many legacy applications still evaluate it for SMTP delivery, but its primary pricing page was not accessible to the crawler during this audit.

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, SMTP.com covers webhook coverage, event stream, and batch sending, and does not cover inbound parsing, idempotency keys, SDK breadth, and multi-tenant support. Whether that gap matters depends on how central those are to the build.

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

Legacy SMTP relay. Treat current deliverability and pricing claims as needing manual verification before publication because the primary pricing page was inaccessible.

Legacy SMTP evaluations where SMTP.com is already on the shortlist.

New developer-led projects that want transparent pricing and modern API ergonomics.