Viktor Dukhovni wrote:
> Transport resolutiont that does remote DNS lookups will be a prohibitive
> performance bottleneck on systems delivering a steady non-trivial stream
> of mail.  The queue manager is not multi-threaded, and each recipient
> domain can/will incur some delay.

Yes.  That would slow things down.  Not worth it.

> I would not recommend doing this until (some nebulous day) the queue
> manager can perform asynchronous transport resolution for multiple
> recipients in parallel.

I'll look forward to it at some nebulous day in the future.  It isn't
really a problem now since it is really only @gmail.com addresses
specifically that run into this problem.  Because of the prevalence of
exactly that one address to be a problem.  And that is handled by the
scheme as described.  So no burdensome problem to solve at this
moment.

Thanks for the help! :-)
Bob

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