I gave AI another try and started from the beginning. Finally I was able to achieve what I wanted.
strSigExt and strSigInt are constant strings holding the signature name.
Sorry, but I cannot save the sub EmbedSignatureImages as code here. It says that content might be spam -> I added as...
I know this thread is quite old, but for me that's the best code I found and even AI was not able to help me with my question.
The code runs perfectly creating new mail items. I tried now to add the signature on the fly before sending the mail. Idea behind is that my business signature should be...