On Tue, 11 Mar 1997, Ian Jackson wrote:
> Why does every message have to be sent the same way ?
>
> Instead, you could every once in a while send each message in a
> separate envelope and see which, if any, came back.
>
> Then you could send all of that subscriber's mail in a separate
> envelope for a while and unsubscribe them if the problem didn't fix
> itself.
You could habitually send each message in two envelopes (each to half
of the list) and vary the split every time. You could work out the
problem address in log N messages instead of having to send N
envelopes :-)
Nicko
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