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RFC2821bis-10 S5.1 Revision: "Unusable" MXs

2008-04-15 17:02:52

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Hi all,

I'm looking over RFC2821bis-10 now.

Section 5.1 now has this (not sure if there's previous context from older 
drafts):

| If MX records are present, but none of them are usable, or the implicit
| MX is unusable, this situation MUST be reported as an error.

What exactly does that mean?  More specifically, what does "Usable" mean? 

Cheers,
Sabahattin

- -- 
Sabahattin Gucukoglu <mail<at>sabahattin<dash>gucukoglu<dot>com>
Address harvesters, snag this: feedme(_at_)yamta(_dot_)org
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http://sabahattin-gucukoglu.com/


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