Hi, We use this version:
Release 7.1.3_GA_3346.UBUNTU10_64 UBUNTU10_64 FOSS edition.

My problem is if I delete the mail and empty the trash, the dumpster folder feature is working correctly but if I empty the trash in thunderbird (imap/smtp) I can't see the mail in the web mail client in dumpster folder (trash > right click > recover deleted item).

What is wrong or why isn't it working?

Thanks for your help.