I asked:
> Has anyone written a patch for Qmail 1.0.3 to reject mail if envelope sender
> domain can't be resolved?

Russell Nelson <[EMAIL PROTECTED]> replied:
> Yes (nods to johnl), but I'm trying to convince Dan that it's a good
> idea.  I think the increase in reliability (rejecting mail which you
> *know* cannot accept a bounce message, should one be generated) is
> worth the increase in cost (more code and network traffic to check the DNS).
[more good reasons deleted]

I'll certainly lend my support for this.  It should be a standard feature,
though it should be possible to disable it.  I'd even settle for the default
being disabled, although I think that is somewhat less desirable.

Eric

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