Author: John W. Baxter Date: To: exim-users Subject: Re: [exim] Verifying rcpt exists before greylisting
On 9/2/07 2:31 PM, "Peet Grobler" <peet@???> wrote:
> New to the list - just subscribed. I need some serious advice.
Others have addressed the mechanics of the thing. I wanted to comment on
the sequence given in the subject.
There's a tradeoff here: if you greylist first, including the invalid
recipients, you avoid letting the greylist-failing bots and one-shot
deliberate harvesters harvest valid addresses. You also increase the
greylisting load.
We elected, perhaps wrongly, to greylist before looking at recipient
validity. (But after public and local RBLs.)
