Automatic "mark as read on focus" as a user setting in (webmail/pro).
Make automatic "mark as read on focus" as a user setting, so it would be possible e.g. in shared/group mailboxes to mark emails as read manually.
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Ivo Fokkema commented
I believe my proposal overlaps with yours or is the same:
I would like to configure when an email will be marked as read. It's a common setting in many mail readers to be able to configure when an email will be marked as read, often with options like "immediately", "after 5 seconds", "after 10 seconds", or "never". I always have it set it to "never". Now, I end up frequently marking emails as unread because the webmail is marking them as read immediately when I click on them just to get an idea of their contents.