[geeks] simple DNS / nslookup question

[der Mouse]

> It's pretty unlikely but there *are* mail administrators out there
> who rely on 'fallback to A-record' (and thus don't have an MX record)
> and there might be MTAs configured not to behave like that.  Both are
> bad behaviours but we see plenty of that on the Internet :)

What's wrong with fallback-to-address?  MTAs not doing it, yes, that's
wrong; that's not how the spec is written.  But - largely because it
*is* how the spec is written - I can't see anything wrong with mail
setups that depend on it.

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