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Thread: SMTP Authentication

  1. #1
    Join Date
    Jul 2009
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    Default SMTP Authentication

    Usually when I set up email from a share hosting provider ... the email side of things requires that I set SMTP Authentication on before mail can be sent or there is an error.

    I would like to do this as well with zimbra.

    I have a client sitting on the local network, and one sitting on a network in another location. I am trying to send mail from me@fshzimbra.lan to admin@fshzimbra.lan.

    I am using thunderbird.

    When I send from client on same network I get below message

    "Sending of message failed.
    An error occurred sending mail: Unable to authenticate to SMTP server mail.fshzimbra.lan. It does not support authentication (SMTP-AUTH) but you have chosen to use authentication. Uncheck 'Use name and password' for that server or contact your service provider."

    When I send from client on external network it does ot mater if smtp auth is on in client or not the mail is sent

    What I want is smtp auth enabled on the server just like how it would be if i purchased hosting from a 3rd party.

    How can i achieve this? Thanks.

  2. #2
    Join Date
    Nov 2006
    Rep Power

  3. #3
    Join Date
    Feb 2009
    Rep Power


    Hi all,\
    Are you using port 465 for the smtp authentication?
    Try this im file.
    465 inet n - n - - smtpd
    -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes
    -o smtpd_client_restrictions=permit_sasl_authenticate d,reject



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