Mr. 包打听, your messages are here. Just guess who is the sender.

Message 1:

Thanks for find out those antique files.  Happy Valentines Day! 

[power=999]from 大喊包[/power]

Tips from Fissy: I didn't change or omit any single word or punctuation. Anything could be the hint.

Now you have 5 chances to ask yes-no questions or give your answer. Go ahead.