06-07-2011
It looks like you need to configure our host properly in sendmail.cf so it says it is what it is, and then the reverse lookup on the opposite end will match, if the DNS is set up right for this host. This varies by sendmail version, and there is much good advice online.
Reverse lookup on your DNS is easy to check, just put your IP on an nslookup command line to see if it knows your host and domain. You might need an nslookup option to make it use the DNS not local files.
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LEARN ABOUT MOJAVE
net::dns::rr::rt5.18
Net::DNS::RR::RT(3) User Contributed Perl Documentation Net::DNS::RR::RT(3)
NAME
Net::DNS::RR::RT - DNS RT resource record
SYNOPSIS
use Net::DNS;
$rr = new Net::DNS::RR('name RT preference intermediate');
DESCRIPTION
Class for DNS Route Through (RT) resource records.
METHODS
The available methods are those inherited from the base class augmented by the type-specific methods defined in this package.
Use of undocumented package features or direct access to internal data structures is discouraged and could result in program termination or
other unpredictable behaviour.
preference
$preference = $rr->preference;
A 16 bit integer representing the preference of the route.
Smaller numbers indicate more preferred routes.
intermediate
$intermediate = $rr->intermediate;
The domain name of a host which will serve as an intermediate in reaching the host specified by the owner name. The DNS RRs associated
with the intermediate host are expected to include at least one A, X25, or ISDN record.
COPYRIGHT
Copyright (c)1997-2002 Michael Fuhr.
Package template (c)2009,2012 O.M.Kolkman and R.W.Franks.
All rights reserved.
This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
perl, Net::DNS, Net::DNS::RR, RFC1183 Section 3.3
perl v5.18.2 2014-01-16 Net::DNS::RR::RT(3)