Guys i first log in with my steam account, and now i cant link my email to my account, the offcial guide was really outdated and i really got stunk here:( PLS inform me how to link my email to the account if ur account was create by steam><
It’s been a few years since I did mine, but if I remember correctly it was somewhere in the settings there was a button for it. I don’t remember much else though. 
Contact support.
Back when this happened to me maybe 2 years ago, they had to reset my account, and then i had to log in via crossout launcher the first time. After that i could use steam no problem.
However that may have changed, idk.
i might be wrong… but if iam not…
you properly signed up to the game with the same email addreas that you use with steam, and therefor it cant link… try and make some random email and add that to your gaijin.net profile, after log into the game and head to settings and try to link your email again, after that it should work 