Compatible with version
This plugin sends email through Mailgun using its API. Once you have enabled the plugin then phplist will send all emails, campaigns and system emails, using the plugin.
To revert to using either the php mail() function or an SMTP server, as specified in the config.php file, you should disable the plugin.
See the README file on the GitHub page https://github.com/bramley/phplist-plugin-mailgun for how to install the plugin.
When you have enabled the plugin there will be a Mailgun group on the Settings page where you can configure the plugin.
Copy the API key value from the Users & API Keys page of the Account Settings page within your Mailgun account.
Enter the Sending Domain that you used when setting-up Mailgun and then had Mailgun verify it.
The plugin does not handle the sending rate, which is done by core phplist as for any other method of sending emails. You should set the throttle, batch size, etc to meet any limit set by Mailgun.
Please raise any questions or problems in the user forum https://discuss.phplist.org/