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    fatal: parameter inet_interfaces: no local interface found for ::1

    Issue:


    1. Unable to start postfix service.
    2. Unable to send outgoing email.
    3. In my case this error came while starting postfix Service.  
    4. fatal: parameter inet_interfaces: no local interface found for ::1


    What is Postfix?


    Postfix is a free MTA used for routing and delivering E-mails. 
    postfix
    Pic credit : wikipedia


    Solution:

    1. Disable IPv6.
    2. Comment the ipv6 entry in /etc/hosts file.
    #::1         localhost localhost.localdomain localhost6 localhost6.localdomain6




    3. Make sure below entries are present in /etc/postfix/main.cf file.
    #inet_interfaces = all
    #inet_interfaces = $myhostname
    #inet_interfaces = $myhostname, localhost
    inet_interfaces = localhost
    # Enable IPv4, and IPv6 if supported
    inet_protocols = all


    4. Now start the postfix service.
    service postfix start 

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