Send a message to support

No account needed. The message is filed as a ticket in the support center and the response carries its number, which the page shows as the reference number; the support center then mails the same number to email in the language lang names (one of the app's fifteen, English otherwise). A bearer credential is optional: a valid one records which account wrote, an invalid one is ignored rather than refused. website is a honeypot: a real person never sees it, and a filled one is accepted with the same 201 but files nothing and carries no number, so a bot learns nothing from the response. 503 when the support center is not configured or does not answer.