Could not instantiate mail function plesk

A Plesk error!

The "Could not instantiate mail function" error in Plesk is usually caused by a misconfiguration or a missing PHP extension. Here are some steps to help you troubleshoot and resolve the issue:

  1. Check PHP settings: Ensure that the PHP mail function is enabled. You can do this by checking the php.ini file. Look for the sendmail_path directive and make sure it's set to a valid path. For example:

    sendmail_path = /usr/sbin/sendmail -t -i

  2. Verify PHP extensions: Check if the PHP mail extension is installed and enabled. You can do this by running the following command:

    php -m | grep mail

    If the output is empty, it means the mail extension is not installed. You can install it using your package manager or by compiling PHP from source.

  3. Check Plesk mail settings: Ensure that the Plesk mail settings are correct. Go to Plesk > Mail > Settings and check the following:

    • Mail server: Make sure the mail server is set to a valid value (e.g., localhost or a remote mail server).
    • Mail relay: Ensure that the mail relay is set to a valid value (e.g., localhost or a remote mail relay).
    • Mail user: Verify that the mail user is set to a valid value (e.g., postmaster or a custom value).

  4. Check PHP version: Ensure that you're running a compatible PHP version. Plesk supports PHP 5.6, 7.0, 7.1, 7.2, 7.3, and 7.4.

  5. Check for conflicts with other extensions: If you have other PHP extensions installed, they might be conflicting with the mail extension. Try disabling other extensions and see if the issue persists.

  6. Reset Plesk mail settings: If none of the above steps work, try resetting the Plesk mail settings to their default values. Go to Plesk > Mail > Settings and click on the Reset to default button.

  7. Contact Plesk support: If none of the above steps resolve the issue, it's possible that there's a bug or a configuration issue specific to your Plesk installation. Contact Plesk support for further assistance.

By following these steps, you should be able to resolve the "Could not instantiate mail function" error in Plesk.