On 10-Feb-2010, at 02:42, Mike Cardwell wrote:
>
> At SMTP time I return a 5xx code during the "DATA" phase for messages
> classified as Spam. However, I also deliver the message into a read only
> "Junk E-Mail" folder for the user,
This is just wrong. Either accept the message, or reject the message. Rejecting
the message while secretly accepting it is just completely wrong.
Let's say your filter catches a legitimate message to u...@yourdomain.tld from
b...@mydomain.tld. Bob gets an erro saying the message was spammy and didn't
go through, so he goes to his gmail account and sends it again, hoping for
better results. This time it goes through.
Now your user has two emails, one tagged spam and one not. One is in
quarantine, and one isn't.
How have you helped your user?
As for your modified 'prove-you-love-me' scheme of quarantines and releases and
web urls, that would look very spammish to me, and I wouldn't follow that link,
even if I did see it which I probably wouldn't because my SA would almost
certainly classify that sort of NDN as spam...
I've never clicked on a prove-you-love-me link, and I'm not about to start now.
And when asked by my customers I recommend they don't click them either. As I
point out, this falls under the class of 'unknown URL from unknown source' and
that's always a risk.
--
'How do you know I'm mad?' said Alice 'You must be' said the Cat
'or you wouldn't have come here.'
