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On Oct 16, 2006, at 2:27 PM, Simon wrote:
I reviewed greylisting as a solution in the past, we couldn't
accept it due to
delay and I also read not all email servers will resend properly.
So there is a
chance few legitimate emails will never get redelivered. When you
are running
a business shop, such delays or exceptions are not permitted.
Fortune 500's are greylisting... so why is it not acceptable?
Really, you should try it for a bit and see if it really works.
sqlgrey keeps a list of sites/addresses that have proven themselves
good, and so over time it delays less legit email. It also has a
list of known sites that are broken to whitelist.
When I implemented greylisting for one site, they called in the next
morning sure that email was broken. But after poring through the
logs, we determined that the real issue was simply that they didn't
get any legit email all night, and all the usual spam had been turned
away. Once business hours opened up, their clients started emailing
them, and the legit messages came right in.
It also reduces the load on the SA servers, which makes the delivery
time quicker. In my experience, greylisting averages out better. :)
David Morton
Maia Mailguard http://www.maiamailguard.com
[EMAIL PROTECTED]
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