attach data table in mail in send outlook mail message activity
Welcome to our uipath community.
Use Output DataTable Activity to convert DataTable into String and then pass that String into Mail body.
If you want table borders then check below thread.
In the below thread I attached one example xaml file. Please check it and try same steps.
I am using the the link you attached. Is there anyway to play with its font size? Because I made it work but the font of the Datatable and values inside are enormous.