Hello.
I’ve just faced a problem using admin roundcube login functionality (based on the instruction). I can login to RC under every mailcow user, but I can’t send email. Errors:
[11-Feb-2022 09:28:47 +0300]: <587b6897> PHP Error: Invalid response code received from server (POST /rc/?_task=mail&_unlock=loading1644560924762&_framed=1&_action=send)
[11-Feb-2022 09:28:47 +0300]: <587b6897> SMTP Error: Authentication failure: Invalid response code received from server (Code: 535) in /web/rc/program/lib/Roundcube/rcube.php on line 1774 (POST /rc/?_task=mail&_unlock=loading1644560924762&_framed=1&_action=send)
Is this only me faced this problem or is this a known bug or is this by design behavior?