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Mailfox vs SMTP Debug Tool

SMTP Debug Tool helps debug SMTP connections, not monitor webhook-based delivery failures.
MailfoxNever let a missed email cost you money again!SMTP Debug ToolTest and debug your SMTP connection. Quickly and for free.

Side by side

What it is
Mailfox:Mailfox monitors transactional email delivery via webhooks and sends instant alerts for bounces and failures.
SMTP Debug Tool:A free web tool to test, proxy, and blackhole SMTP connections with real-time session logs.
Best for
Mailfox:Instant alerts for bounced transactional emails
SMTP Debug Tool:3-in-1 SMTP testing and debugging
Who it’s for
Mailfox:Developers and businesses that rely on transactional email notifications.
SMTP Debug Tool:Developers and engineers who need to debug email sending setups.
Pricing
Mailfox:Paid
SMTP Debug Tool:Free
Works with
Mailfox:Mailgun, SendGrid, Mailjet, Brevo, Resend, Postmark
SMTP Debug Tool:Amazon SES, SendGrid, Mailgun, Sendinblue, Google SMTP, Elastic Email, SMTP2GO, UniOne
DevHunt upvotes
Mailfox:3
SMTP Debug Tool:4
Launched on DevHunt
Mailfox:Dec 2024
SMTP Debug Tool:May 2024

Mailfox features

  • No-code webhook integration. Connect Mailgun, SendGrid, Mailjet, Brevo, Resend, and Postmark in minutes without API keys.
  • Real-time failure notifications. Receive instant alerts when an email bounces, is marked as spam, or fails temporarily.
  • Unlimited event tracking. Track any number of email events without caps.
  • Multi-provider support. Use a single Mailfox webhook URL with multiple email providers simultaneously.
  • Privacy-focused data storage. Only event metadata is stored; email content is never saved.
  • Simple setup. One-minute configuration via provider webhook settings.
Mailfox on DevHunt →Alternatives

SMTP Debug Tool features

  • SMTP Test. Run a quick SMTP session in the browser and view the full conversation log.
  • SMTP Proxy. Log an existing SMTP connection between your app and mail provider for error analysis.
  • SMTP Blackhole. Create a safe test session without exposing real credentials, capturing logs only.
  • Real-time logs. See live, detailed logs of every SMTP command and response.
  • No login required. All core functions are accessible without registration.
  • Extended parameters for logged-in users. Add subject, HTML body, and extra headers, and raise hourly limits.
SMTP Debug Tool on DevHunt →Alternatives

Based on each tool's website and DevHunt data. Details may change; check the official sites.