When our site migrated to Pantheon, all the images in a mailing became broken when the mailing was received.
I saw this (https://stackoverflow.com/questions/27569280/civicrm-civimail-images-are-relative-urls) but the question is only partially answered.
I can't see any settings in the menu for the editor. How do I make the WYSIWYG editor for mailings provide absolute URL refs? Otherwise the images look fine in the preview but are all broken when the mailing is sent.
To clarify, the refs are coming out as "/sites/default/files/civicrm/image.jpg" instead of "http://mysite.com/sites/default/files/civicrm/image.jpg" and that is why they are broken.
Any help would be appreciated. Thanks!