[dns-operations] How to destroy email security and credibility (was:Handling broken domains...)

James R. Cutler james.cutler at consultant.com
Mon Jul 17 23:41:03 UTC 2006

The postal service has a rule:  Addressee unknown (or ambiguous) >> 
do not deliver.  This saves a lot of lawsuits.

jc-draft-dont-break-dns.txt:  DNS MUST NOT cause an MUA or MTA for 
email to guess at a delivery address.

Since DNSSEC is not yet here, MUAs trust DNS to route for 
delivery.  Interfering with this routing by providing "guesses" is a 
very bad thing.

If it is broken, do not use it.

I really want to say something nasty about mucking with DNS, but, if 
you are considering doing so, you are not a gentlemen and already 
know what I mean.

"Strongly worded message follows".

James R. Cutler
james.cutler at consultant.com
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