duplicate e-mails at kopano group members

kmeyer

hi,

grateful for ideas …

WebApp: 6.0.0.22+2006.1
Kopano Core: 10.0.6
Ubuntu 20.04

We have a problem with internal groups of Kopano since update from Kopano Core 8.

Example: I send an e-mail to a group “To” and “CC” to an e-mail which is in group of “To” too.
Result: duplicate e-mails in inbox. (At kopano core 8 only one)

If i send the email “To” to an external forwarding group and “CC” to an e-mail which is in group of “To” too
Result: only one e-mail in inbox.

Is there a way to stop the duplicates ?

thanks