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MailPlus Alias Extension

GPLv3 license Mozilla Add-on

⚠️ This project is still in development. I built it for my own needs, so it might not suit yours. However, feel free to open an issue or contribute if you find a bug or want to improve this extension.

Download on addons.mozilla.org

Features

This extension allows you to create email aliases for your Synology MailPlus account directly from your browser. Idea is the same as Firefox Relay but with your own server, own domain and with no limitation because you can create as much alias as you want for your MailPlus account.

demo

Context menu

You can create a random alias in any input field from the context menu. Just right click on a field and select "Generate new MailPlus alias", the field will then be filled with it.

Forward/block

By default, all created aliases are enabled and will forward to your default MailPlus email address. You can block an alias by clicking the switch.

When blocked, the mail server will reject every email sent to the alias. Just click again to reactivate forwarding.

When deleted, an alias is automatically blocked. This is a safety mesure in case the mail server is configured to forward any inexistant address. If you create an alias with the same name later, it will be unblocked.

You can see the number of forwarded emails for a given alias just next to it.

Only for Synology MailPlus

This extension can only be used by default by administrators of a Synology MailPlus Server. DSM users that are not administrators need to have a delegated permission to access aliases and security features and need to be in at least on domain.

To delegate the access, the administrator need to open the MailPlus Server application in DSM and do the following:

  • Go to "Account" > "Delegation"
  • Click on "+" to add a delegation
  • Select the "Custom" delegation profile
  • (Mandatory) Check "Domain > Alias"
  • (Optional, for enhanced functionalities) Check "Security > Mail Delivery Security" (to block/unblock aliases) and "Auditing > Usage Analysis" (to get forward count).
  • Add the users or group you want to have those permissions in the second tab
  • Click "OK"

⚠️ This extension does not allow touching other user's data, however with the previous DSM permissions, the user will be able to edit a lot of MailPlus Server settings for other users from the DSM interface or with API requests. I advise you to check what these permissions will allow your users to do and see if you are ok with that.

Install

Download on addons.mozilla.org

Build

Run ./build.sh (linux) inside the project directory. This build script only require the zip package to be installed on your system, otherwise you will have to zip the built folder yourself.