John Andersen wrote:
On Monday 20 November 2006 15:08, Rick Macdougall wrote:
It's possible that they could send it all twice but I've never seen it.
Remember that some unbelievable number of infected Windows clients are
the main source of spam and it would just be too much trouble for the
spammer to try every address twice after a 15 minute interval.
Oh come on! It costs the spammer NOTHING to make that adjustment
to his bot net. Its someone else's bandwidth, and someone else's
cpu cycles.
They are reading this list and planning the changes already.
Sure it costs them. If 70K hosts can send 1 billion emails a day, 70K
hosts who have to retry can only send 1/2 a billion emails a day
(probably less with code and retrys, the spammers are not actually
storing the email addresses on the infected machines, they just send an
email to go out).
I'm not saying they won't do it, I'm saying they aren't doing it currently.
Regards,
Rick
