How to get SMTPSVC to publish IP

I have a server that delivers email to our gateway server but it does not publish it's corresponding IP address in the email headers.  Is there a way to configure the SMTP service so that it will provide the IP address in the headers?

Received: from mail pickup service by newweb1 with Microsoft SMTPSVC;
             Tue, 30 Mar 2010 09:15:47 -0700
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AManouxAsked:
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giltjrCommented:
Is it's host name newweb1?

Does it IP address have a PTR record that resolves to newweb1?
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AManouxAuthor Commented:
Yes. That's the host name.
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giltjrCommented:
I checked and I can't find a place to replace the host name with an IP address.  Hopefully somebody else knows how to.
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AManouxAuthor Commented:
I don't think it's a replacement.  Usually the SMTP headers will display both the host or DNS name and the IP address.  For example..

Received: from www21.experts-exchange.com ([64.156.132.161]) by cafilter.company.com with Microsoft SMTPSVC(6.0.3790.3959);

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giltjrCommented:
Two different things.  In your second example the receiving SMTP server only shows its host name. cafilter.company.com.

The www21.experts-exchange.com ([64.156.132.161]) is the sending host.  To produce this the receiving smtp server is configured to do a reverse lookup for the IP address that it received the e-mail from and the IP address has a PTR record setup.  If the sending IP address does not have a PTR record, then only the IP address is shown.
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AManouxAuthor Commented:
Gotcha. It looks like my SMTP headers are missing a hop which would show the reverse DNS lookup of newweb1.
The correct message flow is: Newweb1 --> filter.company.com --> asap.company.com
But from the example below you can see that the SMTP headers never shows the handoff from newweb1 to filter

Received: from mail pickup service by asap.hottopic.com with Microsoft SMTPSVC;
       Thu, 1 Apr 2010 17:58:50 -0700
Received: from filter.company.com([172.16.1.88]) by asap.company.com with Microsoft SMTPSVC(5.0.2195.6713);
       Thu, 1 Apr 2010 17:58:50 -0700
X-TM-IMSS-Message-ID:<279e99ad000243f5@hottopic.com>
Received: from mail pickup service by newweb1 with Microsoft SMTPSVC;
       Thu, 1 Apr 2010 18:00:44 -0700
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giltjrCommented:
It could be of the way you forward the e-mail from newweb1 to filter.company.com.

If you are fowarding it using the smarthost option, I don't think it shows.  The smtp headers are for "normal" SMTP traffi.
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