Can trade or send stuff to other players

I don’t usually do it, but I’ve had this issue a while ago, now I wanted to just send some mats to my friend, but the game says:

To imptove player safety, the ability to send mail attachments is disabled until accounts have a Trusted status.

So my question is what is a trusted status? I’ve read that you have to buy something on steam or smth, I have my acc for 6 years, bought a lot of games and even bought a ark pass.
What do I have to do then to earn “trusted status”?