sendmail problems

[Derek Ragona]

At 01:27 PM 10/18/2007, Duane Winner wrote:
>Derek Ragona wrote:
> > At 06:15 PM 10/17/2007, Duane Winner wrote:
> >> Derek Ragona wrote:
> >> > At 04:07 PM 10/17/2007, Duane Winner wrote:
> >> >> Hello,
> >> >>
> >> >> I need help to resolve a problem with my sendmail server.
> >> >>
> >> >> In my /var/log/maillog, I've been seeing:
> >> >>
> >> >> sm-mta[1753]: l9H4EoAn001753: outbound-mail-10.bluehost.com
> >> >> [69.89.17.210] did not issue MAIL/EXPN/VRFY/ETRN during connection to
> >> >> IPv4
> >> >>
> >> >> I use this server to manage mailman lists, so I knew something was
> >> wrong
> >> >> when I started notice that my own list posts (using a bluehost.com
> >> >> account) were not showing up.
> >> >> So I looked in the logs and noticed the above.
> >> >>
> >> >> At first I thought it might be bluehost.com acting up again, but then
> >> >> tried to send mail from a gmail.com account. Same thing:
> >> >>
> >> >> sm-mta[1785]: l9H4OdFq001785: py-out-1112.google.com [64.233.166.176]
> >> >> did not issue MAIL/EXPN/VRFY/ETRN during connection to IPv4
> >> >>
> >> >>
> >> >> It accepts fine from my company's external email server (different
> >> >> domain, different network), and also accepts from my att.net email
> >> >> account, and many others who post to my lists.
> >> >>
> >> >> I'm not sure where to even begin looking. Any help appreciated!
> >> >>
> >> >> -DW
> >> >
> >> > Are you running only IPv4?  or are you running IPv6?  Or both?
> >>
> >> IPv4 only. When I restart sendmail, I get the following output, which if
> >> I'm interpreting correctly, means that sendmail isn't going to try to
> >> use IPv6 when it's running:
> >>
> >> Oct 17 19:13:23 mymailserver sm-mta[33703]: starting daemon (8.13.6):
> >> SMTP+queueing at 00:30:00
> >> Oct 17 19:13:23 mymailserver sm-mta[33703]: NOQUEUE: SYSERR(root):
> >> opendaemonsocket: daemon IPv6: can't create server SMTP socket: Protocol
> >> not supported
> >> Oct 17 19:13:23 mymailserver sm-mta[33703]: NOQUEUE: SYSERR(root):
> >> opendaemonsocket: daemon IPv6: optional socket disabled
> >> Oct 17 19:13:23 mymailserver sm-msp-queue[33707]: starting daemon
> >> (8.13.6): queueing at 00:30:00
> >
> > It looks like you are trying to run sendmail on IPv6.  You can turn on
> > or off support for IPv6 in the DaemonPortOptions in your *.cf files in
> > /etc/mail.  I would check those and also check your IP stack
> > configuration doing:
> > ifconfig -a
>
>Still broken; I disabled IPv6 in my cf's, and sendmail doesn't even try
>to listen on IPv6 now when I restart it.
>I don't think it did anyway before, it was just trying to but I don't
>have IPv6 in my stack since I disable it in the kernel config, so it
>just ignored ipv6 after startup.
>
>I think something else is going on. The weird thing is that it's just
>certain mail hosts that it's rejecting.

Check the DNS forward and reverse of the rejected hosts.  It may be a DNS 
issue.

         -Derek

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