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Re: greylisting done at end of headers, or end of daya (QUIT) ?

2007-01-31 15:30:44

On Wed, Jan 31, 2007 at 10:21:40PM +0100, Peter J. Holzer wrote:
On 2007-01-30 13:45:15 -0800, SM wrote:
At 12:40 30-01-2007, william(at) wrote:
Who exactly generates new Message-ID per each transmission???

The MTA sending the message generates a new Message-ID each time it 
attempts to send out the message.  I've seen a few cases for 
transactional email.

Yahoo Groups does (or did some time ago) a similar thing with the
envelope sender: They increment a counter in the sender with each
delivery attempt. Needless to say that didn't work well with
greylisting, so I had to whitelist them.

So what information could be used reliably in an enhanced greylisting?
What about the subject, and the date?

best regards

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