Starting today (2023-02-23) I cannot send any email through Sunrise email, using either Apple Mail or Thunderbird.
Yesterday, with automatic configuration, everything worked. Today it did not. I have changed the configuration manually, using the instructions from Sunrise, still nothing.
Error message from Thunderbird: "Sending of the message failed.
The message could not be sent because connecting to Outgoing server (SMTP) smtp2.sunrise.ch failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again."