firstname.lastname@example.org is the e-mail of Tanki Online's Tech Support. Though if you want to contact them, use the Free form. Please keep in mind, if you have a general question about the game, you may contact a Helper of the Game.
Below are topics regarding circumstances which might prompt you to contact Tech Support:
What to do if my account has been stolen?
How to change my nickname?
I lost crystals/XP/items from my account
What to do if my account is blocked due to an inap. nickname?
I’ve been punished, what to do? (Only applies to blocks)
You can find more information about how to register your own e-mail address and send e-mails here: What is e-mail, how do I create one and use it?
Customer support service by UserEcho