hello,
do you use EDM for network, email, web or endpoint policies ?
did you get any errors when you generate EDM ?
If you look at system events after genrating EDM, does number of line found in your input file is correct ?
i think you are testing on your own by putting this data in your email, so you may add a "specific dlp test" keyword i it and corresponding rule in your dlp policy like "DLPSMTPTEST4EDM" so like that you will be sure that email were correctly processed by DLP and issue is only related to your policy rule.
Regards.