You need to create an HTML file for the template, not an INI file. The INI file must be called MAILSIG.INI. You also need to get rid of the second
 Code:
$RootPath = '.\' ; for debugging
line as it is only for debugging in the local directory!

For example, if you have this section in your MAILSIG.INI file
 Code:
[Corporate]
Format=corp.htm
Image=corplogo.jpg
you should have the corresponding CORP.HTM template and CORPLOGO.JPG image file in that folder as well. The name of the section in the INI File corresponds to the OU name. It defines the name of the template and image files to use. Image files can be any supported format, but the template should be a .HTM file and have the HTML content as shown in the example. (ie - any valid, basic HTML code.)

I see you also changed the config file name to config.ini - not recommended!

Glenn
_________________________
Actually I am a Rocket Scientist! \:D