Ok couple of things to try first

1 Check your spam folder
2 Whitelist coin2@gmx.com (Add to your contacts)
3 Try logging in and asking the system to resend the email

If that fails then pm me your email address and I will activate your account, but would prefer if we can get the email to you and follow the normal process as you will need to be able to receive email to do other things (like send payments).

rgds

oldandgrey