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From: Adam Thompson (athompsocommerced.com)
Date: Mon Mar 05 2001 - 00:23:27 CST

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    Running a 2.8-RELEASE kernel without IPv6 support, I discover that I
    cannot run sendmail in daemon mode.

    Running "/usr/sbin/sendmail -bd -q30m", I get the following:

    Mar 5 00:16:48 laptop sendmail[12876]: starting daemon (8.10.1):
    SMTP+queueing00:30:00
    Mar 5 00:16:48 laptop sendmail[12876]: NOQUEUE: SYSERR(root):
    opendaemonsocket: daemon MTA6: can't create server SMTP socket: Protocol
    not supported
    Mar 5 00:16:48 laptop sendmail[12876]: daemon MTA6: problem creating
    SMTP socket
    Mar 5 00:16:48 laptop sendmail[12876]: NOQUEUE: SYSERR(root):
    opendaemonsocket: daemon MTA6: server SMTP socket wedged: exiting

    I've checked, and nothing is listening on ports 25 or 587. Judging from
    the error message, I assume this has something to do with IPv6 - which
    is also one of the main things I'm running without.

    The manpage doesn't mention IPv6, nor does the FAQ.

    Ideas?

    -Adam Thompson
     athompsocommerced.com