Software⏱️ 4 min read📅 2026-06-19

How to Fix: Disable Dovecot pipe error message

Dovecot pipe error message issue fix for VPS with cPanel.

Quick Answer: Disable Dovecot's pipe logging by setting the 'log_path' option to '/dev/null' in your Dovecot configuration file.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. ✅ Best Solutions to Fix It
  3. ✨ Wrapping Up

The 'Disable Dovecot pipe error message' issue affects users who have set up email piping with Dovecot on their VPS managed by cPanel. This error occurs when an error occurs in the piped program, causing it to exit with a non-zero status code and sending a reply to the sender with an error message containing sensitive information.

Disabling this error message is frustrating for users as it can reveal sensitive information about the piped program's location and functionality. However, disabling the error message entirely may not be desirable. The goal of this guide is to provide two methods to address this issue and minimize its impact on users.

⚠️ Common Causes

  • The primary reason for this issue lies in Dovecot's default behavior when encountering a pipe error. When an error occurs, Dovecot sends a reply to the sender with the exit status code of the piped program. This is done as per the standard behavior defined in RFC 3463.
  • Another possible cause is the lack of proper configuration or setup of the piped program, leading to errors and subsequent replies to senders.

✅ Best Solutions to Fix It

Disable Dovecot pipe error message using a custom deliver error handler

  1. Step 1: Open the /etc/dovecot/dovecot.conf file in a text editor as root. Add the following line at the end of the file: `deliver_errors = no`. This will disable the default behavior and prevent Dovecot from sending replies to senders with non-zero exit status codes.
  2. Step 2: Save the changes and restart the Dovecot service using the command `sudo service dovecot restart` or `sudo systemctl restart dovecot` depending on your system configuration.
  3. Step 3: Verify that the error message is no longer sent to recipients by checking the Dovecot logs. You can do this by running the command `sudo grep pipe /var/log/dovecot.log`.

Disable Dovecot pipe error message using a custom deliver plugin

  1. Step 1: Create a new file in the /etc/dovecot/conf.d/ directory, for example `/etc/dovecot/conf.d/10-pipe-deliver.conf`. Add the following lines to this file: `plugin { piperender = yes; }` and `deliver_errors = no`. This will override Dovecot's default behavior and disable the error message.
  2. Step 2: Save the changes and restart the Dovecot service using the command `sudo service dovecot restart` or `sudo systemctl restart dovecot` depending on your system configuration.
  3. Step 3: Verify that the error message is no longer sent to recipients by checking the Dovecot logs. You can do this by running the command `sudo grep pipe /var/log/dovecot.log`.

✨ Wrapping Up

Both methods provided in this guide should help you disable the 'Disable Dovecot pipe error message' issue and minimize its impact on users. By following these steps, you can ensure that sensitive information is not revealed to recipients when an error occurs in your piped program.

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