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Unable to send mail via SSL: warning: TLS library problem: 31990




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    #plesk repair mail

    Repairing the mail server configuration

    Reconfigure all domains and mailboxes? [Y/n]


    What will be reconfigured and will the mailboxes and messages be retained?

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    Ekaterina Babenko


    You can check what plesk repair mail utility from the the following link to our documentation:


    The messages from the mailboxes will not be removed by running the utility. 

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    frederic bigot


    I am facing the same problem but repair mail doesn't work.

    I have installed let's encrypt on webmail, and since then I can't send email using PHPMailer (SMTP connect error)

    maillog says :

    SSL_accept error from localhost.localdomain[]: -1

    warning: TLS library problem: 27872:error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:640:

     lost connection after STARTTLS from localhost.localdomain[]


    it works fine on another server on which I didn't secure webmail. So I think the problem comes from let's encrypt

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    Anzhelika Khapaknysh

    @frederic bigot,

    I would suggest contacting our Technical Support Team for assistance, so they can check the issue in details.

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