feat(server): email notifications

[hitech95]

• SMTP transport is validated when SMTP settings are changed.
• SMTP settings available in the WEB-UI
• React-Mail template engine. It has built in components to provide modern web to "old" table based layout common in emails and text/plain email.
• It is possible to view the rendered templates in real-time by running npm run email:dev in the server directory. This just ned the dependencies to be installed and does not require the full server to be running.
• This can also be integrated with tailwind and generate email templates from already available classes.
• Simple notification triggered when an user is created from the POST request to /user endpoint.
• Option to skip sending welcome email when creating a new user

Known issues:

• To generate server side URLs it is required to have the Server url configured. There is no handler right now if this fails the job also does.

Screenshots

Admin settings

Create user form

Welcome email template

[zackpollard]

Overall looks solid, a few comments but nothing major. One thing I did want to check though is do we currently support encrypted SMTP servers with this? Generally when setting up SMTP you specify whether the server supports encryption and what kind (example from nextcloud)

[jrasm91]

The library we're using will automatically upgrade to smtps if the mail server indicates it support the STARTTLS extension.

https://www.nodemailer.com/smtp/#tls-options

[bo0tzz]

automatically upgrade to smtps

This feels prone to breakage or MITM attacks. Is there a way to enforce it, something like a toggle to reject plaintext connections or such?

[danieldietzler]

automatically upgrade to smtps

This feels prone to breakage or MITM attacks. Is there a way to enforce it, something like a toggle to reject plaintext connections or such?

Yes there is. So maybe enable that by default and have a toggle that optionally allows for insecure connections?

[zackpollard]

FWIW it seems nextcloud does the same thing, there option is None/STARTTLS, so presumably they also auto upgrade

[aviv926]

I would be happy if we could add documentation to this.
I hope to have some time to document this, can you put your name on Discord for me in case I have questions?