How does Mailfox work?

Mailfox integrates with transactional email providers through webhooks. When an email fails to deliver, Mailfox receives the webhook notification and immediately notifies you so you can take action. The setup is simple with no API tokens required, and users can be up and running in about a minute.

What types of emails is Mailfox designed for?

Mailfox is specifically designed for transactional emails, including order confirmations, password resets, account notifications and other critical communications that are essential to business operations and customer retention.

Which email providers does Mailfox support?

Mailfox supports Mailgun, SendGrid, Mailjet, Brevo, Resend and Postmark, with plans to add support for more providers. Users can connect multiple providers simultaneously.

Is coding knowledge required to use Mailfox?

No coding skills are needed. Setting up Mailfox is straightforward with simple steps to integrate the webhook URL into your email provider's settings, and the user-friendly interface makes it easy for anyone to get started.

Are there limits on the number of email events I can track?

No, there are currently no limits on the number of email events you can track with Mailfox.

Fact sheet · Email & notification APIs

Mailfox

Get instant notification of failed emails from your transactional email providers

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Mailfox monitors transactional emails and instantly notifies you when they fail to deliver, helping you reduce support costs and maintain customer trust.

Overview

Screenshot of the Mailfox homepage — What mailfox.dev looks like

Mailfox is a webhook-based monitoring tool for transactional emails. It integrates with email providers like Mailgun, SendGrid, Mailjet, Brevo, Resend and Postmark to provide real-time notifications when emails fail to deliver, bounce, or have other issues.

The service requires no coding skills or API tokens to set up. After signing up, users add a webhook URL to their email provider's settings and receive instant alerts when problems occur, allowing them to take immediate action.

Mailfox is designed for businesses and developers who need reliable delivery of critical communications like order confirmations, password resets and account notifications. It operates on a one-time payment model with no ongoing fees or limits on the number of email events tracked.

Feature facts

Instant notifications for email failures
Support for Mailgun, SendGrid, Mailjet, Brevo, Resend and Postmark
No-code setup in one minute
Track multiple email event types
Connect unlimited providers
Unlimited email event tracking
Multiple provider support simultaneously
Webhook-based architecture

Pricing

Pricing model: Paid

One-time payment: 99€

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Mailfox specifications

Specifications of Mailfox
Section	Email & notification APIs
Origin	Klagenfurt, Austria
Website	mailfox.dev
Votes²	0

Mailfox metrics

Fact file for mailfox.dev: Ahrefs Domain Rating and Majestic link facts, each with the change since the last fact check.
Metric	Value
Domain Rating	12 −17 (down) since last check
Trust Flow	9 no change since last check
Citation Flow	22 no change since last check
Referring domains	91 no change since last check
External backlinks	130 no change since last check

Fact: Ahrefs Domain Rating checked 12 Nov 2026, fact changed 8 Nov 2026. Fact: top topic Society/People (9). Fact: Majestic checked 18 Oct 2026, fact changed 18 Oct 2026. Link facts from Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

Mailfox domain fact sheet

Open the fact sheet

Read from the public RDAP record on 12 Nov 2026, 08:06 UTC.
Domain age	2 years
Registered	10 Jun 2024
Expires	10 Jun 2027
Registrar	Key-Systems LLC
DNSSEC	Not signed

Every domain fact for mailfox.dev

Mailfox launch receipt sheet

What we have measured for Mailfox since it went live on SaaS Directory Info on 18 October 2026.

12 Domain Rating (Ahrefs) −10 (down) since launch
at launch: 22 (18 Oct 2026); latest: 11 Nov 2026
9 Trust Flow (Majestic)
first measured 18 Oct 2026
91 Referring domains (Majestic)
first measured 18 Oct 2026

Day 25 since launch. Next receipt: day 30, 17 Nov 2026. The figures report a change; they do not say what caused it, and many things can. No figure here is a guess.

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Frequently looked up

Q1How does Mailfox work?: Mailfox integrates with transactional email providers through webhooks. When an email fails to deliver, Mailfox receives the webhook notification and immediately notifies you so you can take action. The setup is simple with no API tokens required, and users can be up and running in about a minute.
Q2What types of emails is Mailfox designed for?: Mailfox is specifically designed for transactional emails, including order confirmations, password resets, account notifications and other critical communications that are essential to business operations and customer retention.
Q3Which email providers does Mailfox support?: Mailfox supports Mailgun, SendGrid, Mailjet, Brevo, Resend and Postmark, with plans to add support for more providers. Users can connect multiple providers simultaneously.
Q4Is coding knowledge required to use Mailfox?: No coding skills are needed. Setting up Mailfox is straightforward with simple steps to integrate the webhook URL into your email provider's settings, and the user-friendly interface makes it easy for anyone to get started.
Q5Are there limits on the number of email events I can track?: No, there are currently no limits on the number of email events you can track with Mailfox.

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