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From: Joshua E Warchol (jwarcholdsl.net)
Date: Thu Jan 04 2001 - 11:13:35 CST

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    While investigating where a customer's mail went I found that the trail
    of syslog messages disappeared.

    We are running Postfix-19991231-pl12

    Messages to this customer were being deferred because their mailserver
    (actually the mailserver of another ISP they use) was rejecting connections.
    I see the logs showing delivery attempts and deffers, but they suddenly stop
    with no bounce log or delivery log. See the examples below:

    Dec 31 16:34:43 mxr01.nyc01.dsl.net postfix/smtpd[7613]: 0375C34449:
        client=smtp.amausa.com[209.141.225.2]
    Dec 31 16:34:43 mxr01.nyc01.dsl.net postfix/cleanup[7616]: 0375C34449:
        message-id=<002006CAAB0CD311873900805FC7338D0B5623smtp.amausa.com>
    Dec 31 16:34:43 mxr01.nyc01.dsl.net postfix/qmgr[21050]: 0375C34449:
        from=<RWikborgamausa.com>, size=790 (queue active)
    Dec 31 16:35:37 mxr01.nyc01.dsl.net postfix/smtp[7314]: 0375C34449:
        to=<alfseaoilshipping.com>, relay=none, delay=54, status=deferred
        (connect to indefatigable.cnchost.com[207.155.248.27]: Connection refused)
    Dec 31 16:36:47 mxr01.nyc01.dsl.net postfix/qmgr[21050]: 0375C34449:
        from=<RWikborgamausa.com>, size=790 (queue active)
    Dec 31 16:36:52 mxr01.nyc01.dsl.net postfix/smtp[6520]: 0375C34449:
        to=<alfseaoilshipping.com>, relay=none, delay=129, status=deferred
        (connect to indefatigable.cnchost.com[207.155.248.27]: Connection refused)
    . . . (continues on)
    Dec 31 21:32:29 mxr01.nyc01.dsl.net postfix/qmgr[21050]: 0375C34449:
        from=<RWikborgamausa.com>, size=790 (queue active)
    Dec 31 21:33:18 mxr01.nyc01.dsl.net postfix/smtp[16057]: 0375C34449:
        to=<alfseaoilshipping.com>, relay=none, delay=17909, status=deferred
        (connect to indefatigable.cnchost.com[207.155.248.27]: Connection refused)

    These are the last two lines logged relating to message 0375C34449

    I have another message, to the same customer, that ends similarly. Does
    anyone have a recommendation on what may have happened, what I can change
    to improve this.

    Joshua Warchol
    UNIX Systems Administrator
    DSL.net