I am trying to send a mass mailing and cannot send images. If I use a theme template and send the test message, the images load. However, if I change any of the images to one we have one our website, or by uploading my own image, they do not appear. When the message is saved, occasionally they disappear and become the error loading image icon in the backend, and whenever they are sent, no image. We have tested with several accounts and loaded the message on GMail in browsers, Outlook, iPhone, and Android.

If I 'inspect' the image and try to go to the link for the image, it gives a long google address then ours. I am able to pull up the image if I go to the link, even if I'm not signed into the database. Is this a permission error somewhere? Is it because we have more than one odoo database on the server (one is our live instance and one is our testing grounds)?

Desperately trying to get images to work since we need to send emails with images to customers. Losing sales leads not being able to send proper messages.

Enterprise 10 Self Hosted; Ubuntu Server