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From: "Drew Tomlinson" <drew@mykitchentable.net>
To: "FreeBSD Questions" <questions@freebsd.org>
Subject: "traceroute" For Sendmail?
Date: Thu, 11 Oct 2001 10:03:08 -0700
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How can I turn on logging to see each step of a mail transfer?
Something like traceroute but for mail.  I've detailed my situation
below but wanted to ask my question up front.

Thanks,

Drew

-----------------
Details

I'm attempting to resolve a mail problem.  I have two FBSD 4.4 boxes.
One is a firewall and the other a mail and web server.  While building
the firewall, my network looked like this:

        ISP
         |
         | IP is DHCP
         |
  ADSL Modem/Router
         |
         |192.168.1.1
         |
   -----------------
   |               |
Firewall        Server
192.168.1.2     192.168.1.4

I setup an alias for root so that my mail would be forwarded to the
server and everything worked fine.  Once I completed building my
firewall, I changed my network config to this:


        ISP
         |
         | IP is DHCP
         |
  ADSL Modem/Router
         |192.168.10.1
         |
         |192.168.10.2
      Firewall
         |
         |192.168.1.2
         |
      Server 192.168.1.4

Now my messages from the firewall are not received by the server.  The
mail log on the firewall says that the connection was refused.  The mail
log on the server doesn't show any connection attempts from the
firewall.  I ran "tcpdump port 25" on the server but didn't see any
traffic when running "sendmail -q".  I was able to see traffic when I
used telnet to connect to port 25 from the firewall to the server.



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