From owner-freebsd-questions  Tue Jan 13 20:07:43 1998
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Date: Tue, 13 Jan 1998 20:06:16 -0800 (PST)
From: Doug White <dwhite@gdi.uoregon.edu>
Reply-To: Doug White <dwhite@resnet.uoregon.edu>
To: bsd account <bsd@smmcroute.smmc.qld.edu.au>
cc: freebsd-questions@FreeBSD.ORG
Subject: Re: Server setup mystery...HELP?
In-Reply-To: <Pine.BSF.3.91.980113084740.265A-100000@smmcroute.smmc.qld.edu.au>
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On Tue, 13 Jan 1998, bsd account wrote:

> Hi folks...
> Thanks to Dan & Randy for their replies to "Help startingDNS".
> I have got problems! - ain't we all ;^)
> I am sorry...I am a bit of a dummy but I'm trying!
> 
> Problems are as follows:
> 	a) When Routed runs stuff like PINE Telnet etc wont run! Appears to  
> 	be looking at the modem's semi-permanent connection!??
> 	b) When routed option is set to NO Pine LYNX etc all work fine but
> 	mail being delivered can't arrive.
> 	Says that "554 <bsd@smmc.qld.edu.au> local congiguration error exists. 
> 	554 MX entry smmc.qld.edu.au. points back to smmcroute.smmc.qld.edu.au"

Routed OFF is the correct configuration.

However problem b) is a DNS problem:

gdi,ttyp1,~,18>host smmc.qld.edu.au
smmc.qld.edu.au has address 203.56.180.1
smmc.qld.edu.au mail is handled (pri=10) by smmcroute.smmc.qld.edu.au
gdi,ttyp1,~,20>host smmcroute.smmc.qld.edu.au
smmcroute.smmc.qld.edu.au has address 203.56.180.1

Notice that smmc.qld.edu.au == smmcroute.smmc.qld.edu.au.  

Your MX record points back to the same machine, creating a mail loop. 
Sendmail is doing you a favor telling you about the misconfig.  I suggest
removing your MX entry or point it to a different machine.

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major