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- Maybe in reply to: Simon Waters: "Thanks - and spam stats"
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From: mouss (no email)
Date: Thu Jun 02 2005 - 12:04:14 EDT
wrote:
>> queuing is not needed and would be too much programming overhead for
>> a spammer. The only thing a spammer would have to do is:
>> resend spam to his previous target list again after lets say 5-10
>> minutes.
>
>
> Not really accurate. The spammer must resend from the *same* source to the
> *same* recipient after the *individual* greylist period of the target
> host has
> passed, so this would be too much effort if you can spam some ohter
> thousand
> addresses in the same time.
"Usually", queuing means resending the same message. Here, the spammer
just needs to send another spam to the failed recipient. this way, he
uses the same (client, sender, recipient), but with possibly different
messages. not trivial, but not very hard to do.
as previously said, this is more or less a concern, since he may end up
in BL.
>
>> What me more worries is, that services like yahoo hotmail and msn seem to
>> have some mystic deals with blacklists - but still allow sending of spam.
>
>
> The percentage of spam compared to the number of mails is actually
> really low
> from this sites. It isn't that easy to keep a userbase of some million
> clean.
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