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Exchange 2007 IP address

I am having trouble delivering emails to certain domains.  I can see the problem is the IP address.  The error reports:

mail.domain.com (mail.wrongdomain.com [wrongip]).  Where is this information generated and how I can change mail.wrongdomain.com [wrongip] to the correct values?

I have checked SPF records, MX records and all seem to report the correct information.
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mbravome
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mbravome
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2 Solutions
 
tigermattCommented:

Where are you finding this information? Is mail.domain.com your domain, or the domain to which you are sending?

The information you are seeing is being returned from a DNS lookup. This will use the DNS Server(s) configured on the Exchange Server's NIC, hopefully your internal Active Directory DC(s). These DNS Servers will be resolving external lookups either via root hints (from the root nameservers) or by forwarding requests to a nameserver at the ISP. If it is not your domain to which you are referring, the DNS configuration is beyond your control; the recipient's administrative team would need to make the appropriate DNS changes.

-Matt
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Death_RatCommented:
First, I take that your server ip address if fixed and not dynamic. Then I would remove the address from the DNS and then let it rebuild.
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mbravomeAuthor Commented:
Thanks for your reply.  mail.domain.com is my domain.  The error comes in the bouncedback email. When I perform a nslookup on the domain from a computer connected directly to the internet, the correct ip address is returned.  How can the recipients server query to DNS return a different IP address?  fyi, my exchange server sits behind and ISA fierwall.
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tigermattCommented:

Would you mind posting the email domain here to enable us to perform some DNS checks?
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mbravomeAuthor Commented:
Ok, here is the actual piece that I find incorrect:  via mail.mosaicresearch.ca (mail.perseushosting.ca [209.90.136.112]) SPF result Fail; #702 (l40Fid044642415900) 550 5.7.1.

mail.perseushosting.ca should not be reported but mail.mosaichosting.ca and the correct IP address should be 209.90.136.118, I think.
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tigermattCommented:

You've probably got a number of issues which need ironing out DNS-wise.

The first thing I'd suggest you do is check your MX record configuration. At present, I am seeing a direct connection to your server (mail.mosaicresearch.ca) as the preferred MX record, with 2 No-IP MX records configured with lower priority. I would guess you may have a backup MX service at No-IP making these intentional. If this is the case, no worries here.

Second - verify on your Receive and Send Connectors that the correct server name is being reported. If mail.mosaicresearch.ca is what is used in DNS, the Send and Receive connectors should report it as this. I have no way of testing the Send Connector, but your receive connector's FQDN currently reads pcsrvex1.mosaicresearch.ca, which must be its internal name but has no resemblance in external DNS.

I also see the SPF record for your domain is configured to allow mail.mosaicresearch.ca on an IP of 209.90.136.118 to send email externally. 209.90.136.118 maps to mail.perseushosting.ca which is not mail.mosaicresearch.ca; this will once again cause some issues.

-Matt
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mbravomeAuthor Commented:
209.90.136.118 should map to mail.mosaichosting.ca. Does it not?
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tigermattCommented:

That's just introduced another complication. mosaichosting.ca and mosaicresearch.ca are mapping to two completely different places. What is the link between them? Same Exchange org or different altogether?

-Matt
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mbravomeAuthor Commented:
Same exchange. Perseushosting domain changed to mosaichosting. Not sure why perseushosting is being picked up yet.
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mbravomeAuthor Commented:
Found the problem.  I actually needed to change the IP address in the external NIC for my ISA firewall to reflect the new IP.  That was all :).

Thanks for the replies!
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