Topic Thread

How to disable AUTH PLAIN on FortiMail 5.2.4 build 447

  • 1.  How to disable AUTH PLAIN on FortiMail 5.2.4 build 447

    Posted 11-17-2015 20:00

    How to disable AUTH PLAIN on FortiMail 5.2.4 build 447

    If telnet to FE and issue ehlo dmz.lab, see 250-AUTH LOGIN PLAIN

    220 FEVM040000048646.localdomain ESMTP Smtpd; Tue, 17 Nov 2015 21:57:00 -0800
    ehlo dmz.lab
    250-FEVM040000048646.localdomain Hello [192.168.11.1], pleased to meet you
    250-ENHANCEDSTATUSCODES
    250-PIPELINING
    250-8BITMIME
    250-SIZE 10485760
    250-DSN
    250-AUTH LOGIN PLAIN
    250-STARTTLS
    250-DELIVERBY
    250 HELP

    I couldn't find anything from docs but from some FortiCare, engineer advised to

    config system mailsetting

     set smtp-auth disable

    end

    But this command remove all SMTP auth.

    220 FEVM040000048646.localdomain ESMTP Smtpd; Tue, 17 Nov 2015 21:48:22 -0800
    ehlo dmz.lab
    250-FEVM040000048646.localdomain Hello [192.168.11.1], pleased to meet you
    250-ENHANCEDSTATUSCODES
    250-PIPELINING
    250-8BITMIME
    250-SIZE 10485760
    250-DSN
    250-STARTTLS
    250-DELIVERBY
    250 HELP
    auth login
    503 5.3.3 AUTH not available
    Connection to host lost.

    Is this expected? or any way to just turn off AUTH PLAIN

    Thanks

    Viet