Attached jpeg/png does not work when sending and receiving.

[augustynr]

Hi, I have the latest version of the kopano on Univention.
When I try to send a picture as an attachment I get a ‘na’ picture in the received email.
When I paste the picture into the email that works fine.
Attaching pdfs and other formats work fine.
I have the same problem is someone sends me the picture as the attachement.
Any idea how to resolve it?
Thank you.

[fbartels]

crosspost: https://help.univention.com/t/kopano-does-not-send-attached-pictures/14063

[gerd]

I had this behavior before.
In my case wrong permissions on the /tmp folder was the cause.

Check permissions for the user that runs the webserver (might be www-data) on the temp folder Kopano-Web-app is using.

Yours, Gerd