Hi,
I have installed postfix+dovecot+roundcube.
If I send an email from roundcube I immediately receive the error
SMTP Error(250): Authentication failed
[07-May-2021 20:06:57 +0200]: <np0qq8it> PHP Error: SMTP server does not support authentication (POST /?_task=mail&_unlock=loading1620410817331&_framed=1&_lang=en&_action=send)
[07-May-2021 20:06:57 +0200]: <np0qq8it> SMTP Error: Authentication failure: SMTP server does not support authentication (Code: ) in /var/www/roundcube/program/lib/Roundcube/rcube.php on line 1702 (POST /?_task=mail&_unlock=loading1620410817331&_framed=1&_lang=en&_action=send)
Can you help me?