🚀 go-pugleaf

I am trying to run sendmail 5.65 with the Berkeley config files (I have
used a homebrew config file that has fallen behind the times).

The host I am testing on is in the dfci.harvard.edu subdomain, and must
be able to send mail to user@host when host is in the upper level
harvard.edu domain.  Must means that users require it.

Though I am running Ultrix 4.1, I have compiled sendmail with the 4.8.3
resolver library.  In my /etc/resolv.conf I have search set to:

	search dfci.harvard.edu harvard.edu other.do.main

So for mail to user@host the resolver first tries host.dfci.harvard.edu
and, if that fails, tries host.harvard.edu, then host.other.do.main.

This seems to work well with one exception.  When I send mail to a host
in the harvard.edu domain, using the unqualified name, mail gets
delivered fine, and all seems to indicate that it was correctly
processed.  Specifically, sendmail -bt shows user@host being resolved
to user@host.harvard.edu.  The sendmail dialogue (mail -v) shows a
correct address.  The message, however, has a header of:

	To: user@host.dfci.harvard.edu.

That suggests that in some place the domain name is being appended to
the unqualified host name, rather than calling the resolver to
canonicalize.  I cannot find any place where $D is appended whithout
a previous attempt (usually two lines higher) to use the resolver.
It happens every time, so cannot be a temporary slow name server
response.

Any help will be much appreciated.

Mohamed