On 23/09/2020 20:13, Ian Zimmerman wrote: >
> But once you accept a
> message with a success status after the DATA stage, you are obliged to
> either really deliver it or else bounce it back. It is not acceptable to
> send messages down a "black hole".
This *should* not be acceptable (and it's very annoying if you are a
legitimate sender who has his email swallowed like this) but this method
works well for the big mail service providers, who all seem to do it.
Many of their users don't even care that, as a result, they are missing
mail from legitimate contact and customers.
You'd think that customer pressure would force the service providers to
act more sensibly but because the customers don't *see* the problem they
don't care about it, even small business customers who lose business as
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