I clicked on the “Picture” option in the top toolbar, searched for the image on my computer, and clicked “ok”. The image appeared, but was not included in the email when it was received (I tried sending one to myself).
The Enterprise edition does include the "Campaign Manager"...you probably just haven't chosen to display it in the icon bar (click Setup>Workspace>Icon Bar).
I suspect the image is not showing because it's too big in it's size-on-disk, because I think there's a size limitation on the image size.
Try using a smaller jpeg image or load the jpeg into paint and save it as a png image (which should make it smaller). Then do a single test to yourself to see if the image appears.
Apart from that...I would strongly advise you upgrade your CRM 12 Enterprise system to the latest CRM 2019 R3 release, either 'On Premise' or in Maximizer's CRM Live cloud platform...which I would be happy to discuss...as we've delivered 'On Premise' upgrades to US customers before.
Maximizer CRM 2016 R2 Group Edition has the same functions as Enterprise (including the campaign manager). It not the standalone PC version called Entrepreneur, but it was possible to have a 1 user Group edition system (using SQL Express).
How did you get on with a smaller image/graphic in you test?
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .