If you are unable to send attachments from your plesk panel after you have upgraded Plesk on your dedicated server or dedicated cloud VM, check the permissions of the .horde dir in /tmp. The dir permissions should be set as this:
Attention in classroom
If you are unable to send attachments from your plesk panel after you have upgraded Plesk on your dedicated server or dedicated cloud VM, check the permissions of the .horde dir in /tmp. The dir permissions should be set as this: