i installed and configured open project on my ubuntu 18.04 server. I have one little problem, maybe someone can help me:
I configured a SMTP Server in the email notification settings. Testmail and sending email notification is working. But images are not visible inside the email. I only see a boarder with a question mark as you can see in the picture.
When I open the email in the editor and decode the base64 string I can see that the image url show to "/openproject/api/v3/attachments/10/content". I think the hostname is missing, but the hostname is configured correctly in the settings.
Whats the problem here.
