Hello @Arfa and thanks for your comments.
Performance issues with Runbox 7 are likely related to the generic backend problems that we have been working on and that are now mostly under control.
When using a local/synchronized index, folder navigation and searching should be near-immediate when operations are running normally, and when using a relatively modern device on a decent network connection.
If you notice lag, we would appreciate it if you would be able to check the Web Console in your browser’s Developer Tools for errors, as well as the Network tab in said tools for any delays in the communication with the server. Details from these can help us pinpoint where the specific issue lies.
Your experience could also be related to this issue which is under investigation:
Since indexing and synchronization is happening on the local device to achieve this functionality, changes in CPU load may occur on each index update (every 15 seconds) and this seems more noticeable on Windows systems depending on index size. We will look into this discrepancy further.
When accessing message content the front-end is using the same back-end as Runbox 6, but may be more sensitive to slowness on the servers and we are investigating this issue as well.
We are increasingly focusing on streamlining the UX to remove remaining points with performance issues. We have for instance made improvements to functionality such as marking (multiple) messages in the list, and are working on further improvements to make all functionality respond immediately.
Regarding HTML messages they are always sanitized for security reasons, a text version of the message should be shown if HTML view is not enabled (whether or not one was included with the email, which should be the case).
A related issue which may overlap with what you describe can be found here:
Regarding overall layout and vertical spacing, we have this existing issue:
I should emphasize that the majority of our users are very happy with Runbox 7, and that we are adding further resources to resolve remaining obstacles such as those described here.
– Geir