Adding this add-ons repository to your Home Assistant instance is pretty easy. Follow the official instructions on the website of Home Assistant, and use the following URL:
https://github.com/fboulay/ha-addons-repository-
Install the ProtonMail bridge to send emails using your ProtonMail account
ProtonMail Bridge is an application available to all paid users that enables the integration of your ProtonMail account with any SMTP clients (in theory). Bridge runs in the background by seamlessly encrypting messages as they leave Home Assistant.
This addon allow to send notification emails using a ProtonMail account.
MIT License
Copyright (c) 2021 Florian Boulay
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.