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SMTP Auth connection delay

Posted on 2006-05-26
Medium Priority
Last Modified: 2013-12-16
Using Plesk and Qmail on Fedora Core 3.

In Plesk, you specify SMTP Auth required.
There is a delay when connecting to the SMTP relay (20-30 seconds) before the email is accepted from the client machine.

I am trying to establish what underlying processes are involved in the AUTH process and acceptance of the email for relay in an attempt to reduce the delay.


Question by:sheepfarmer
  • 2

Author Comment

ID: 16772841
I wonder if this file has something to do with it?  Comments?

service smtp
        socket_type     = stream
        protocol        = tcp
        wait            = no
        disable         = no
        user            = root
        instances       = UNLIMITED
        server          = /var/qmail/bin/tcp-env
        server_args     = /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true

Author Comment

ID: 16776762
Sorted it.

If anyone is interested, the -Rt0 argument was added to the server_args line thus:
       server_args     = -Rt0 /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true

Basically, this throws away the TCPREMOTEINFO request and sets the timeout to zero.  man tcp-env for details.


Accepted Solution

PAQ_Man earned 0 total points
ID: 16777634
Closed, 500 points refunded.
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