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Re: FWIW Connection Sharing Stats

2011-08-27 09:47:36
On Aug 27, 2011, at 9:53 AM, Keith Moore wrote:

On Aug 26, 2011, at 8:18 PM, Hector Santos wrote:

Among the spammers rejected with delays, many do try a new transaction with 
the same failed result.  Is this CS client behavior? I seems to appear that 

Maybe the spammers are trying to deal with greylisting?

For that matter, I wonder if legitimate senders are trying to deal with 
greylisting also.  Maybe there are poor implementations of greylisting that 
block legitimate traffic too often.  Maybe there are some large-volume senders 
that don't want to deal with having greylisted mail in their queues any longer 
than necessary.  If retrying after a few seconds works on some greylists, it's 
not surprising that some senders would start doing it.