For unknown reason Google decided to block us (or rather rate limit) because we send to many "unsolicited mail originating from your IP address".
Thus no registration or password reset emails can be sent to @gmail or @googlemail addresses.
There is no known way of escalation and there is not much more that we can do except to wait.
"Nerds have a really complicated relationship with change: Change is awesome when WE'RE the ones doing it. As soon as change is coming from outside of us it becomes untrustworthy and it threatens what we think of is the familiar."
– Benno Rice
Gmail unblocked us. If you don't receive your pending message in the next few hours, just re-register/resend your password again.
"Nerds have a really complicated relationship with change: Change is awesome when WE'RE the ones doing it. As soon as change is coming from outside of us it becomes untrustworthy and it threatens what we think of is the familiar."
– Benno Rice