Interesting new dns failures

Roger Marquis marquis at
Mon May 21 18:54:36 UTC 2007

On Mon, 21 May 2007, Jason Frisvold wrote:
> They're likely not name servers, or at least not all name
> servers.. I'd venture a guess as to these being part of a
> "Snowshoe" spammer network... I've been getting hit by similar
> domains for a few weeks now.. Blocking seems to be the best way
> to handle them..

Fastflux does seem to be a tool in some spammer's kits but these
particular domains are probably not being used for that, at least not
effectively, since they have no MX records.

Are there sites that accept mail from domains without a valid MX/A

Roger Marquis
Roble Systems Consulting

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