Fixed
The problem has been resolved, and it should be possible to send to Gmail emailadresses again.
The problem was caused by a minor configuration change on our email sending platform.
We will closely keep monitoring mail traffic to Gmail for any irregularities.
Reported
We have noticed that emails sent to Gmail-addresses since this morning are being refused by Gmail-servers and can currently not be delivered.
Our team is working to investigate the problem. We apologize for any inconvenience.