Bug when sending emails

    Good Evening,
    I have a bug in iMSCP. If I want to send e-mails via. Roundcube comes the following error: SMTP Error (250): The authentication has failed.
    I ask for help.
    Yours sincerely,
    R3Dtig3r

    Hello;


    Without further info, we cannot help you. First please provide us the logs from /var/log/mail.log

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