Domains: reliable DKIM checks, clearer delete

DKIM verification is more reliable. Some correctly published DKIM records failed to verify, or failed for up to half an hour after you deleted and re-added a domain. We fixed three causes: long DKIM keys are now compared consistently across DNS providers, a stale cached record can no longer hide the current one (we ask your domain's own nameservers), and we now re-check by ourselves: every 10 minutes for the first two hours after a domain is verified, then hourly, for up to 48 hours. When your DNS is right, the domain becomes send-ready without you pressing anything.

Deleting a domain says what actually happens. The dialog used to say your Motor Blocks would be permanently deleted. They never were. Deleting a domain that has Motor Blocks deactivates them: they are marked domain missing and keep their credentials, limits and history, and you can recover them by assigning a verified domain. A domain that has Motor Blocks can only be deleted together with deactivating them, so the Delete Domain button now stays disabled until you confirm that.

You do not need to do anything for either change.