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.

Judged purely as an API. What the request contract guarantees on retry, how complete the webhook event coverage is, whether suppressions are readable and writable programmatically, and how much the message log retains when something needs debugging in production.

Against high-frequency programmatic sends where a missed delivery is a product failure, SMTP.com covers webhook coverage, event stream, the suppressions API, and batch sending, and does not cover idempotency keys and SDK breadth. Whether that gap matters depends on how central those are to the build.

• Idempotency keys: No
• Webhooks: Yes
• Event stream: Yes
• Operating since: Not published
• Suppressions API: Yes
• Best published rate per 1,000: Tiers not published in comparable form
• Batch sending: Yes
• SDKs: None
• Deliverability: Legacy SMTP relay. Treat current deliverability and pricing claims as needing manual verification before publication because the primary pricing page was inaccessible.

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.