Operations

Send Workflow Failure Alerts with Mailgun

Send a Mailgun email with diagnostics when a configured workflow fails.

Setup

Connect Mailgun and configure the sending domain, verified sender and recipient. In Open Flow, select the source workflows in Receive a workflow failure, publish and enable the error workflow. In n8n, assign this error workflow to each source workflow and activate it. Avoid assigning it to itself. Enable only one format.

Behavior

An automatic failure sends a plain-text email with the workflow name and available diagnostics. Open Flow includes the run ID, error code and message, and any node ID, job ID and path supplied by its error event; it does not provide a stack trace. n8n includes the source error message and stack trace when available. Open Flow also reports indeterminate runs. Manual test runs do not represent automatic error dispatch.

Diagnostics may contain sensitive information; restrict the recipient and execution history. A failed or uncertain email may already have been delivered, so check before retrying.

Inspiration & credits

Changes to the source

Configure the previously empty sender and recipient. Open Flow reports the diagnostics provided by its error event; n8n retains the source stack trace.

Adapted from Send a workflow failure email with Mailgun in Zie619/n8n-workflows. The source export does not identify a separate template author or license.

The collection’s MIT notice is pinned at a later revision. This is the collection notice at that revision; it does not establish a separate original template author’s license. Our changes are listed above; see repository licensing.

MIT License

Copyright (c) 2025 Zie619

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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