David It's defined in the RFC as: "Retries continue until the message is transmitted or the sender gives up; the give-up time generally needs to be at least 4-5 days" See: https://www.ietf.org/rfc/rfc2821.txt Of course that's an RFC, so while *most* mail servers might work that way there's no guarantee that they all will Regards Michele -- Mr Michele Neylon Blacknight Solutions Hosting & Colocation, Domains http://www.blacknight.co/ http://blog.blacknight.com/ http://www.technology.ie/ Intl. +353 (0) 59 9183072 Direct Dial: +353 (0)59 9183090 Twitter: http://twitter.com/mneylon ------------------------------- Blacknight Internet Solutions Ltd, Unit 12A,Barrowside Business Park,Sleaty Road,Graiguecullen,Carlow,Ireland Company No.: 370845 -----Original Message----- From: gnso-ppsai-pdp-wg-bounces@icann.org [mailto:gnso-ppsai-pdp-wg-bounces@icann.org] On Behalf Of David Cake Sent: Tuesday, July 29, 2014 6:20 PM To: James M. Bladel Cc: gnso-ppsai-pdp-wg@icann.org Subject: Re: [Gnso-ppsai-pdp-wg] Question It used to be the standard practice was that mail servers would continue trying to deliver for four days. Regards David On 29 Jul 2014, at 6:15 pm, James M. Bladel <jbladel@godaddy.com> wrote: I¹ll also see if we are tracking/counting this stat. Another helpful data point might be how many ³bounces² are later resolved, meaning the delivery failure was a temporary situation that was later corrected. This could be important if a relay obligation were framed in terms of ³unsuccessful delivery after X attempts or within Y business days² or something similar. Thanks< J. On 7/29/14, 10:42 , "Graeme Bunton" <gbunton@tucows.com> wrote: That's a good question Kathy, I'll see if I can dig some stats up from our systems. Graeme _________________________ Graeme Bunton Manager, Management Information Systems Manager, Public Policy Tucows Inc. PH: 416 535 0123 ext 1634 -----Original Message----- From: gnso-ppsai-pdp-wg-bounces@icann.org [mailto:gnso-ppsai-pdp-wg-bounces@icann.org] On Behalf Of Kathy Kleiman Sent: Tuesday, July 29, 2014 11:32 AM To: Metalitz, Steven; gnso-ppsai-pdp-wg@icann.org Subject: [Gnso-ppsai-pdp-wg] Question Hi Steve and Alex, Good discussion today - much appreciated. Quick note: I can certainly understand the desire to know if an email went through. Quick question: do you have any idea how many "bouncebacks" we are talking about? In today's environment, with the current forwarding work by proxy/privacy providers, do you have any idea how many messages are undeliverable vs. how many may be received but not responded to? I know each messages is important, but are we talking about a high percentage or a very low percentage? Tx, Kathy _______________________________________________ Gnso-ppsai-pdp-wg mailing list Gnso-ppsai-pdp-wg@icann.org https://mm.icann.org/mailman/listinfo/gnso-ppsai-pdp-wg _______________________________________________ Gnso-ppsai-pdp-wg mailing list Gnso-ppsai-pdp-wg@icann.org https://mm.icann.org/mailman/listinfo/gnso-ppsai-pdp-wg _______________________________________________ Gnso-ppsai-pdp-wg mailing list Gnso-ppsai-pdp-wg@icann.org https://mm.icann.org/mailman/listinfo/gnso-ppsai-pdp-wg