On 07/01/2014 03:29 PM, Martin Gregorie wrote:
On Tue, 2014-07-01 at 19:17 +0000, Jeremy McSpadden wrote:
No mention of RBLs or greylisting ...
Quite.
When my ISP switched on greylisting my mail immediately went from a
spam:ham ratio of 80:20 to one of 20:80
But the variable delay, which is not under your control? My users
complained loudly about that minority of mails which took an hour to
arrive. I had to turn it off. Yes, I'm sure the autowhitelist features
help with time. But we're always receiving mail from new customers whom
our mail server has never heard from before. And you really don't want
to not receive a mail from a new customer for an hour or more when you
are a service company advertising fast and efficient service of your
customers' restaurant kitchen equipment during the lunch hours.
I did not find greylisting viable for our use case. And I suspect many
businesses would have similar incompatibilities with the strategy.
-Steve
