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Article #40Re: MX help
From: Neil Rickert
Date: Tue, 03 Nov 1992 03:32
Date: Tue, 03 Nov 1992 03:32
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1303 bytes
In article <1992Nov3.000641.21040@synapse.bms.com> zilaitis@synapse.bms.com (Vicki Zilaitis) writes: > > The following wildcard does not work for hosts inside our domain > if they have an A record but not an MX entry in the DNS. Yet the > lookup works for hosts that do not have an A record: That is part of the definition of wildcards. They only apply if the name is not otherwise present in the database structure. > This problem is compounded by the problem that in non-literal > lookups the domain name is appended twice. You have stumbled upon one of the disadvantages of wildcards. They match any bogus name, if that name is first qualified in your domain. The best advice is that if you are on Internet, avoid wildcards. They are mainly useful systems not directly on Internet, and which therefore cannot easily maintain their own records.
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<1992Nov3.033257.19681@mp.cs.niu.edu>Path:
arc1-ca.pugleaf.net!sparky!uunet!noc.near.net!hri.com!ukma!wupost!zaphod.mps.ohio-state.edu!sdd.hp.com!ux1.cso.uiuc.edu!mp.cs.niu.edu!rickertReferences:
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Path: arc1-ca.pugleaf.net!sparky!uunet!noc.near.net!hri.com!ukma!wupost!zaphod.mps.ohio-state.edu!sdd.hp.com!ux1.cso.uiuc.edu!mp.cs.niu.edu!rickert From: rickert@mp.cs.niu.edu (Neil Rickert) Newsgroups: comp.mail.sendmail Subject: Re: MX help Message-ID: <1992Nov3.033257.19681@mp.cs.niu.edu> Date: 3 Nov 92 03:32:57 GMT References: <1992Nov3.000641.21040@synapse.bms.com> Organization: Northern Illinois University Lines: 18