OT sendmail delay

[Gbenga Shobowale]

On 10/6/06, bryan at coxagri.com <bryan at coxagri.com> wrote:
> David G. Miller wrote:
> > Bryan Hepworth wrote:
> >
> >> route
> >>
> >> Kernel IP routing table
> >> Destination Gateway Genmask Flags Metric Ref Use Iface
> >> 192.168.2.0 * 255.255.255.0 U 0 0 0 eth1
> >> 169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
> >> 94.0.0.0 93.0.0.100 255.0.0.0 UG 0 0 0 eth0
> >> 92.0.0.0 93.0.0.100 255.0.0.0 UG 0 0 0 eth0
> >> 93.0.0.0 * 255.0.0.0 U 0 0 0 eth0
> >> default 192.168.2.1 0.0.0.0 UG 0 0 0 eth1
> >>
> > The 169.254.0.0 entry is for compatibility with a Microsoft
> > peer-to-peer networking.  It shouldn't hurt anything.  The 94.0.0.0,
> > 92.0.0.0 and 93.0.0.0 entries are probably not what you want unless
> > the route to these subnets should still be out eth0 (the 93.1.1.208
> > NIC).  My take on your original posting was the eth0 was no longer in
> > use.
> >
> >> dig internal
> >>
> >> ; <<>> DiG 9.2.4 <<>> any internal.coxagri.com
> >> ;; global options: printcmd
> >> ;; Got answer:
> >> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 8694
> >> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
> >>
> > NXDOMAIN is dig's way of saying it can't find an IP address for
> > internal.coxagri.com.  See if you can get this boxes name and IP
> > address to resolve through dig.  Sendmail likes to have it's hostname
> > resolvable through DNS.
> > Cheers,
> > Dave
> >
> Dave
>
> Thanks for your reply to this. When I was doing further checks I found
> that it was also failing reverse dns look ups. So I bit the bullet and
> started to learn about dns. Would you have any advice to offer as to
> best practice for this?
>
> I was thinking that we need an internal dns server to keep sendmail
> happy with all the internal people that use it to send out email.

I think you should just configure your DNS for internal use or at
least on the mail server...that way it would resolve mails for your
local domain and send mails which are meant for other domains out of
your network depending on your ISP

> Sendmail  isn't currently taking mail in yet directly. That's taken from
> the box that's hosted at the ISP and brought in by fetchmail. Long term
> this was going to change and the MX record externally (at the ISP) was

This is also possible and would not be much of an issue you would need
to tell your ISP or you could do it on your own. Redirect all mail
traffice MX to the IP address and you really don't have to do anything
on your mail server or on the DNS...

This approach is better is better than fetchmail...
> going to point to our adsl router.
>
> Any advice would be much appreciated.
>
> Bryan
>
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