I bought some XEL coins via heatwallet a while ago, but as you can't trade with them meanwhile on the heat platform, I would like to transfer them for being more flexible, but unfortunately I don't know how to get the xel's away from heatwallet.

Via slack a guy named oscurito23 messaged me following:

----------------------
I saw you
TRansfer asset
recipient fim2@heatwallet.com
asset XEL
amount amount
Message YOUR WALLET
fim2 is the automatic procesor for XEL of heat
not my acount
ty for trust in my
---------------------

He mentioned that I will get a certain amount of heat's for the xel's after sending to the recipient.

Questions:
1) How to get sure that "recipient fim2@heatwallet.com" is not a fake? Sounds like being the wallet from anyone else..
2) Isn't it possible sending xel coins from heatwallet to f.e. bittrex? I don't want to sell coins yet as i would have to pay taxes

Could not find any help so thanks for all useful answers.