Mailfox
Never let a missed email cost you money again!
One time feeEmails3,874 impressions#9 of its week
Mailfox monitors transactional email delivery via webhooks and sends instant alerts for bounces and failures.
- for
- Developers and businesses that rely on transactional email notifications.
- pricing
- paid
Key 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.
Use cases
- Detect and fix bounced order confirmation emails before customers notice.
- Monitor password-reset email delivery to reduce support tickets.
- Track spam-flagged notifications to improve sender reputation.
- Ensure booking confirmation emails reach partners across multiple providers.
Mailfox vs alternatives
 Mailfox |  Maildroppa |  Zyntra |  SMTP Debug Tool |  Mailik | |
|---|---|---|---|---|---|
| Best for | Instant alerts for bounced transactional emails | Email marketing automation | Email receipt API for tests | SMTP connection debugging | Lead capture from web forms |
| Pricing | Paid | Free | Subscription | Free | Subscription |
| DevHunt upvotes | 3 | 27 | 7 | 4 | 3 |
| Launched | Dec 2024 | Oct 2024 | Apr 2025 | May 2024 | Feb 2025 |
- Mailfox vs Maildroppa: Maildroppa focuses on email marketing automation, not real-time bounce alerts.
- Mailfox vs Zyntra: Zyntra provides an API to receive emails for testing, whereas Mailfox monitors delivery of transactional emails.
- Mailfox vs SMTP Debug Tool: SMTP Debug Tool helps debug SMTP connections, not monitor webhook-based delivery failures.
- Mailfox vs Mailik: Mailik captures missed web-form leads, while Mailfox tracks transactional email delivery issues.
Mailfox FAQ
How does Mailfox work?+
It receives webhook events from your email provider and instantly notifies you of delivery failures.
What types of emails does it monitor?+
It is designed for transactional emails such as order confirmations, password resets, and account notifications.
Do I need coding skills to set it up?+
No, the setup is no-code: just add the Mailfox webhook URL to your provider’s webhook settings.
Can I use Mailfox with multiple providers at once?+
Yes, you can add the same webhook URL to each provider you use.
Is any email content stored?+
Mailfox only stores event metadata, not the actual email content, to protect privacy.
Summarized by DevHunt from mailfox.dev · Sep 29, 2026. Details may change; check the official site.
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