One of our customers is running the latest supported Kopano / Z-Push edition and I can also expierience issues like that. Postfix is limited to 30MB but a user accidently tried to send a 80MB file which is now stuck in the Outbox and is not deletable.
Do I have to remove the complete OST file or is there any other way to get rid of such a message ? (this message is in Outbox since last friday morning, so waiting does not solve the issue. Closing Outlook neither.)