Re: Greylisting BCP
"Murray S. Kucherawy" <[email protected]>
| Newsgroups | gmane.ietf.asrg |
|---|---|
| Message-ID | <F5833273385BB34F99288B3648C4F06F19C6C14C4A@EXCH-C2.corp.cloudmark.com> |
> -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Peter J. Holzer > Sent: Wednesday, October 19, 2011 8:59 AM > To: [email protected] > Subject: Re: [Asrg] Greylisting BCP > > * Some sender MTAs change the envelope sender with every delivery > attempt (Yahoo Groups used to do this, but stopped several years ago. > I don't know any recent example). This garantuees that the triple > never matches ... Yuck. OK, added. > * Some ISPs use one machine for the first delivery and another for > processing the queue. The "queue processing" IP will get whitelisted > but the "first try" address wont (unless you are lucky), resulting in > a constant delay for every mail. I think that's covered, in slightly more general terms.