You don't show any code, so it is hard for us to give you concrete advice.
Please tell use where exactly you have problems:
Do you have a problem finding the mail body?
Do you have a problem finding the keyword ("training") in your case?
Do you have a problem printing the filename on a condition?
The best approach is to reduce your code to something relevant, self-contained and short (http://sscce.org) and post that code. This allows us to reproduce your situation and give you concrete advice towards your next goal.
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