Allow html tags & attributes in sent email & signatures (table, colors...)

[maheini]

Is your feature request related to a problem? Please describe.

If you try to respond to a perfectly formatted html email, the formatting will get trashed. Html tables won't work, as well as "advanced" formatting like color etc.

Describe the solution you'd like

Enable/allow advanced html tags & attributes

Describe alternatives you've considered

Workaround: Use one single image instead of a html table. But links won't be clickable.

Additional context

No response

[maheini]

Sidenote: html table support (for e.g. Signaturet & marketing-mails) is extremely broad used & supported by all major email clients: https://www.caniemail.com/features/html-table/

[ChristophWurst]

This app uses CKEditor as WYSIWYG editor. There is a plugin for "source editing". It could make this possible: https://ckeditor.com/docs/ckeditor5/latest/features/source-editing.html.

[alexanderdd]

related: #4557