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warning: TLS library problem:

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  • warning: TLS library problem:

    when I try to send mail to my mail server from Espo, I get this error.

    warning: TLS library problem: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca:s3_pkt.c:1153:SSL alert number 48:


    ​​​​​​​Has anyone seen this?

  • #2
    This is a Postfix issue

    PHP Code:
      postfix/smtpd[18426]: warningTLS library problemerror:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca:s3_pkt.c:1293:SSL alert number 
    Please show the main.cf and master.cf files

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    • #3
      It is a docker deployment. Here is main.cf



      Mailu - Insular email distribution - email server as Docker images

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      • #4
        and master.cf
        Mailu - Insular email distribution - email server as Docker images

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        • #5
          The problem in SSL certificate, it need to be signed by CA. Fails to verify peer certificate because unknown CA.
          In version PHP 5.6 - 7.1 SSL checking is required but you can disable checking in config.
          Last edited by AlexAv; 04-18-2017, 07:52 AM.

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