Hello Dirk, I'm sorry to hear you're having issues with domain signature images. One thing that can cause issues here is the permissions on our uploads directories. To check this please verify the following criteria are met: 

- Ensure the SmarterMail/SmarterTrack application pool in IIS has been configured to use the network service account within the Advanced Settings. 

- Ensure the C:\Program Files (x86)\SmarterTools\SmarterX\MRS folder has been configured to allow the Network Service account in Windows Full Control over it and its subfolders/contents. 

Please give that a shot, then reattach those signature images, then test this one more time and let me know your results. I hope this helps! Have a good one!

Hey Dirk, hope you're having a great day! I just wanted to ping you to see if you were able to confirm those permissions are in place? If you continue to have trouble with this I recommend submitting a ticket so we can take a look. Have a good one!

Sorry Kyle I never saw the reply. 

Yes, those requirements are all met. Server upgraded last night to the latest 21 Dec build, issue remains. Domain signatures are not working, images are not showing. (The images do show in the signature editor.)

Hi Dirk, 

How are you adding the image to the signature? Did you paste the image in the editor? Or do you do one of the following methods:

I am not sure that you understood the question, I am referring to domain signatures via domain admin. I have tried copy/paste and external, also via source.