Re: Using DIGEST MD5 SMTP-AUTH on RedHat

From: Noel Jones (no email)
Date: Mon Feb 15 2010 - 17:49:50 EST

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    On 2/15/2010 4:30 PM, Rob Tanner wrote:
    > Hi,
    >
    > I have TLS turned on on my server but since that server also accepts
    > incoming mail from the internet, I canít require itís use and so it is
    > certainly possible that some of our users using AUTH-SMTP are still
    > connecting unencrypted. Currently the only authentication mechanism we
    > are using is PLAIN and so I want to use CRAM or DIGEST MD5. All the
    > helps I can find on the web give instructions on building from source
    > but Iím running a RedHat Enterprise server and all the libraries are
    > already installed. The problem is that I canít find any instructions on
    > how to configure to use mechanisms beyond PLAIN and if I specify
    > noplaintext in main.cf, Postfix just hangs.
    >
    > Is anybody using any of the secure authentication mechanisms and would
    > you be willing to share your configuration with me?
    >
    > Thanks,
    > Rob

    The easy solution is set in main.cf
    smtpd_tls_auth_only = yes
    so that TLS is required before AUTH is offered.

       -- Noel Jones


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