Mail-Tester

Mail-Tester gives senders a generated address, analyzes the received message, and returns a spam score with authentication and content diagnostics. It is not a full monitoring suite, but it is one of the simplest ways to catch obvious DNS, SpamAssassin, and content issues before a campaign sends.

A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.

Against trial expiry notices, dunning, onboarding sequences, and per-tenant transactional mail, Mail-Tester covers none of the capabilities this audience leans on (multi-tenant support, event stream, the suppressions API, scheduling, and webhook coverage), so it fits only where those needs are genuinely absent.

• Multi-tenant: No
• Event stream: No
• Suppressions API: No
• Operating since: Not published
• Scheduling: No
• Best published rate per 1,000: Tiers not published in comparable form
• Deliverability: Not a sender. Scores one message at a time and helps identify obvious authentication, blacklist, and SpamAssassin issues.
• Webhooks: No
• Starts at: $50 for 500 tests, or larger prepaid test packs

Not a sender. Scores one message at a time and helps identify obvious authentication, blacklist, and SpamAssassin issues.

Developers and marketers who need a quick preflight check for a specific message.

Teams that need continuous DMARC monitoring or inbox placement reporting.