Xref: utzoo comp.mail.sendmail:2635 comp.protocols.tcp-ip.domains:608
Path: utzoo!utgpu!watserv1!watmath!att!linac!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!julius.cs.uiuc.edu!roundup.crhc.uiuc.edu!ux1.cso.uiuc.edu!mp.cs.niu.edu!rickert
From: rickert@mp.cs.niu.edu (Neil Rickert)
Newsgroups: aus.mail,aus.aarnet,comp.mail.sendmail,comp.protocols.tcp-ip.domains
Subject: Re: Strange behaviour with MX record lookups, mailers, ...
Message-ID: <1991Jan31.150724.18473@mp.cs.niu.edu>
Date: 31 Jan 91 15:07:24 GMT
References: <6587@munnari.oz.au>
Organization: Northern Illinois University
Lines: 39

In article <6587@munnari.oz.au> kre@cs.mu.OZ.AU (Robert Elz) writes:
>I received the following message from a new Internet site here in
>Australia ...
>
>   From: r.liu@trl.OZ.AU (Richard Liu)
>   Subject: Re: MX records for hosts on oz.au
>
>[NWR: much text deleted]
>   ...
>
>I thought that perhaps my reply may be of some more general interest
>(none of this IMHO stuff here...) so I thought I would send it to
>the newsgroups/mailing lists this article is being sent to...
>
>[NWR:I have deleted a most of a lengthy, and generally correct but
>     occasionally misleading commentary which followed.]
>
>The next (more serious, and fortunately, less common) bug,
>is that sendmail deliberately disables the resolver default
>domain appending in several places where it calls the
>nameserver.  This is fine, and what should happen.  Unfortunately
>there are modified versions of sendmail around, in which that
>particular line of code has been commented out, so default
>domais get added in places where they shouldn't (under any
>circumstances) be added (it will work in some setups, but not
>in others).
>
 The real problem is that while sendmail deliberately disables local
domain qualification, it does it in the wrong place.  Or, more precisely,
it reenables domain qualification too late, so that header addresses are
not properly qualified.  This is why the code is often disabled.

 I believe the latest (5.65) IDA versions of sendmail do this correctly.

-- 
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
  Neil W. Rickert, Computer Science               <rickert@cs.niu.edu>
  Northern Illinois Univ.
  DeKalb, IL 60115                                   +1-815-753-6940