Ok, changed it to a yahoo.de account. Hope thats secure enough 
Depends how secure you made it. Hope you didn't use some of the basic security questions that are easily guessable.
That may work, however the most secure email would be one that cannot possibly exist (IDK why the forum does not allow the option of simply not having an email at all). What I recommend using is [username]@bitcointalk.org, since the forum does not offer email services it would not be possible to hack/create that email address (although you would be somewhat out of luck if you forgot your password)
Couldn't theymos or possibly BadBear create those emails and steal the accounts?
