RE: mail does bounce (was: Customers down?)

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I think I like it better that way. Just because both nameservers are temporarily down doesn't mean the domain doesn't exist. :P

Seems to me you're talking past one another. If all nameservers for a domain are down there *is* no nameserver which can say that the domain is authoritatively non-existent. (OK, you could get a negative caching answer from one of the authoritative servers on the level above, but that's a different issue...)

I agree with Greg Woods - if a domain is authoritatively non-existent, I'd expect a sane mailer to bounce the message.

I'm glad that you don't write code, especially sendmail code.