From: "Jonas Eckerman" <[EMAIL PROTECTED]>
Logan Shaw wrote:
Basically, greylisting has an achilles heel: legit messages
from unknown senders are delayed a long time. This is fine for
Only if you use a long delay.
In my experience a grey period of 3 minutes is enough to stop most spam and viruses.
Especially if you combine it with some anti-dictionary stuff.
<<jdow>> There are indications that this is no longer the case. The
spams apparently come in repeated bursts of four or five about 5
minutes apart. Since it is common for spam to use the same header
values except sometimes "To:" for all messages sent this trips up
greylisting. I ran across a fellow on the FC users list (I believe
it was) that remarked about seeing this and it defeating his greylist.
{^_^}
