SMTP send: NOT OK(Failed to add recipient 'xxxxx@xxxxxx.com')

[HTF]

Hi I'm receiving the following message:
SMTP send:  NOT OK(Failed to add recipient 'xxxxx@xxxxxx.com')

I have hMailServer and everything is working fine with Thunderbird but I cannot figure it out where is the problem with Roundcube.

I'm not using SSL.

Regards

[SKaero]

What is in your RoundCube error log?

[HTF]

Hello,

The problem was with authentication and I found the solution:

$rcmail_config['smtp_user'] = '%u';
$rcmail_config['smtp_pass'] = '%p';
$rcmail_config['smtp_auth_type'] = 'LOGIN';

Thx