Postfix SMTP Allowed Domains - Plugin for aaPanel
Plugin Download On Github
Overview
The Postfix SMTP Allowed Domains Plugin for aaPanel enables administrators to restrict SMTP sending to specific allowed domains. This plugin automatically configures Postfix to enforce sender restrictions using an allowed_domains list.
Understanding smtpd_sender_restrictions in Postfix
The smtpd_sender_restrictions directive in Postfix is used to define rules that control which senders are allowed or denied from sending emails through the server.
Features
- Restricts SMTP sending to predefined domains.
- Automatically configures Postfix to enforce restrictions.
- Manages allowed domains directly from aaPanel.
- Supports adding and removing domains dynamically without manual file editing.
Postfix Configuration Changes
Upon installation, the plugin automatically checks if the setup already exists. If not, it updates /etc/postfix/main.cf by adding:
smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/allowed_domains
Installation
- Download the plugin postfix_allowed_domains.zip and save it in a suitable directory.
- Import it into aaPanel under App Store > Third-party Plug-ins > Import Plugins.
Uninstallation
To remove the plugin, go to App Store > Third-party Plug-ins > Uninstall Plugin.
Features following
Lists Allowed Domains
Retrieves the current list of allowed domains
Adds an Allowed Domain
Option To Add a domain to the allowed list
Removes an Allowed Domain
Option To Remove a domain from the allowed list
The plugin manages the allowed domains file
/etc/postfix/allowed_domains
Each domain is added in the following format:
example.com OK
anotherdomain.com OK
After modifying the file, the plugin runs:
sudo postmap /etc/postfix/allowed_domains
sudo systemctl restart postfix
Support
If you encounter issues, please open an issue on GitHub.
License
This project is open-source and licensed under the MIT License.
