- Plesk for Linux
- How to customize the mail notification template?
- How to customize email notification footer and header?
- How to customize email notification logo or CSS styles?
To adjust the text and subject of the notifications, follow the instructions available here:
Starting from Plesk Obsidian, it's possible to adjust the styling of the notifications (Logo, CSS, HTML structure, etc.) according to the instructions available in Customizing the look of the notifications - Plesk Obsidian Administrator's Guide.