Pricing
smtppeek is free for on-demand SMTP diagnostics. A Pro tier is planned with additional features for regular use.
Everything the tool does today — no account needed.
- ✓Single-port SMTP check (25, 465, or 587)
- ✓SMTP banner and capability readout
- ✓STARTTLS detection
- ✓Auth method identification
- ✓Connection timing measurement
- ✓No account or sign-up required
- ✗Rate limit applies Standard
Planned features for power users. Pricing is indicative — may change at launch.
- ✓All Free features
- ✓Multi-port scan — check all 3 ports at once Planned
- ✓Export results (JSON, CSV) Planned
- ✓Priority processing Planned
- ✓No rate limit Planned
- ✓Comparison view against known-good baselines Planned
Pro tier is in development
The Pro tier is not yet available for purchase. No payment information is collected anywhere on this site. smtppeek does not store data, require sign-up, or handle credentials — the free tool does everything available today.
Check back for updates on multi-port scanning, result export, and priority processing.
Try the free tool →Frequently asked questions
Is smtppeek really free?
Yes. The Free tier does everything the tool offers today — enter a hostname, get the SMTP diagnostic results. There is no account, no trial period, and no credit card required. Rate limits apply to ensure fair access for everyone.
When will the Pro tier be available?
The Pro tier is in planning. Features like multi-port scanning, result export, and priority processing will ship when ready. This page will be updated with launch details — we do not collect email addresses or operate a waitlist.
Do I need an account?
No. smtppeek has no user accounts, no sign-up, and no stored data. Every check is a single request with no state.
What ports can I check?
Standard mail ports only: 25 (plain SMTP), 465 (SMTPS / implicit TLS), and 587 (submission). Other ports are not supported.