My System:
Release 7.2.0_GA_2669.UBUNTU8 UBUNTU8 FOSS edition, Patch 7.2.0_P1.

If I delete an mail in Outlook it markes it as deleted (mail is crossed out).
When I now look into the Webmail, this mail is gone and I can't see it.
But this mail is not gone from the server. It requires space.

I know how to delete this mails permanently in Outlook/Thunderbird/...?
But why I can't see this mails in Webmail? (Known) Bug?