On Wed, 4 Feb 2004, Xiaoyan Ma wrote:
> Thanks again. Although I have not found a solution yet, I have learned more
> about MD with everyone's help.
This is pseudocode that shows how CanIt does it if you defer greylisting:
sub filter_begin () {
my $recip;
my $tempfail = 0;
foreach $recip (@Recipients) {
if (should_greylist($Sender, $recip, $RelayAddr)) {
$tempfail = 1;
# Note: We do NOT break out of the loop here!
}
}
if ($tempfail) {
return action_tempfail("First-time sender tempfailed as anti-spam measure;
please try again.");
}
}
As others wrote, it's important to check *all* the recipients each time,
otherwise you end up greylisting many times over for a mail with lots of
recipients.
Regards,
David.
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