How to trade and send mail?

[Hokuto]

in game i can't to send mail and trade item to my friend 

can help me? 

[Kaiservadin]

might be locked behind a level limit

[Enhance]

Level 15 required for trading. To be able to send mail you need to have charged your NC at least once. 

[Rott3nh3art]

I get the 15lvl req, but charged NC is pure bs :(.