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тАО08-14-2000 04:14 PM
тАО08-14-2000 04:14 PM
Exchange/Sendmail Configuration Problem
Currently, I have myhpbox.foo.bar.com relaying mail to myexchange.foo.bar.com and this works quite well. This was accomplished using the DS macro in the sendmail.cf file.
I have a public DNS server with the following:
12.59.1.96 IN A myhpbox.foo.bar.com
MX 10 myexchange.foo.bar.com
12.59.2.120 IN A myexchange.foo.bar.com
Problem:
When mail is sent to user@myhpbox.foo.bar.com the originating mail server does a nslookup and discovers the MX record and correctly forwards the mail to myexchange.foo.bar.com. Now myexchange.foo.bar.com having received the mail performs its own nslookup for myhpbox.foo.bar.com, discovers the MX record and forwards the mail to itself in a loop until ttl kills it. Exchange doesn't seem to know what its hostname is.
I believe that the HP sendmail is configured correctly. What do I have to do to get exchange to do what we intend?
On exchange we have tried putting in the ip address to forward to but it reconstructs the To: header and changes it to user@ipnumber instead of user@fqdn. This causes sendmail to reject it.
Please only answer this if you have successfully performed the same type of environment. I have already received many well intentioned but wrong suggestions.
Thanks
David
kard235@lni.wa.gov
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тАО08-18-2000 04:41 AM
тАО08-18-2000 04:41 AM
Re: Exchange/Sendmail Configuration Problem
I have installed sendmail 8.10 on our HP9000 running HPUX 11.00, we are
> connected to internet via a router and we use MS-Exchange server as a
> local mail server.
>
> I need sendmail to get our messages from our internet
> provider and send them to MS-Exchange server. the same for
> outgoing messages. Does anyone have any ideas?
This is really more of a DNS and specifically a MX problem.
I infer port 25 is open and NATing thru the router to the HP
box -- the HP box is handing off to the NT running Exchange,
thus:
|
( internet ) --- /NAT router/ ------+---port 25-- /HP/
routable IP | 10.0.0.1 | 10.0.0.2
| |
| -- /NT/
DEMARC 10.0.0.3
Set the external DNS lowest MX for the HP sendmail box. Set
the internal DNS MX to 10 for the NT Exchange, and 20 for the
HP. Set the ACCESS file for the HP to RELAY your internal and
external domain names.
... External mail will deliver to the HP
... the HP will relay external mail to the NT
... Internal mail will be offered first to the NT, and the HP
will act as a backup.
*********************************
Regards,
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тАО08-18-2000 05:09 AM
тАО08-18-2000 05:09 AM
Re: Exchange/Sendmail Configuration Problem
Example, Exchange has an MX of 10, HP has an MX of 20
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тАО08-18-2000 08:57 AM
тАО08-18-2000 08:57 AM
Re: Exchange/Sendmail Configuration Problem
Here's what we had to do in Exchange.
"I have Exchange set up to reroute mail for myhpbox.foo.bar.com to myhpbox.foo.bar.com. What stops a loop is that I then set up a smarthost entry stating than any mail for myhpbox.foo.bar.com is to be sent to the host at ###.###.###.###"
Thanks for all the suggestions.
-David
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тАО08-18-2000 07:02 PM
тАО08-18-2000 07:02 PM
Re: Exchange/Sendmail Configuration Problem
I.E.
MX 10 myexchange.foo.bar.com
should really be
MX 10 myexchange.foo.bar.com.
It may be just your example, but if not most apps bomb, even though it is not visible. "dig" dies a nice job of showing errors, as well as the DNS servers syslog.
Sincerely,
Shannon
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тАО09-06-2000 07:47 AM
тАО09-06-2000 07:47 AM
Re: Exchange/Sendmail Configuration Problem
Thanks, Wayne