I've seen it happen perhaps twice in twenty years, from what I can non-scientifically recall. 99.99999% of the time we've had somebody complain they can't find the mail in their Gmail account, it is because it's in their spam folder. I'm not particularly worried that there's some new outbreak of this. Even back in the day, unexpected internal delays inside of Gmail were more common, and even those were relatively rare.
To your point, yeah, Microsoft used to be the big bad who would discard mail after accepting it and that was a super huge pain to deal with. That seems to be a thing of the past, thankfully. Cheers, Al Iverson On Wed, Apr 13, 2022 at 7:59 PM Jarland Donnell via mailop <mailop@mailop.org> wrote: > > I've seen Microsoft do that very thing many times over the years, > accepting an email but never delivering it. I have to admit, I have not > once witnessed this with Gmail. Given how much volume we do where > customers bring their own domains, I would find it strange to have not > run into it, if it is an actual issue that occurs. > > Filtering to the spam folder of course happens with email that received > a 2xx, but I've not yet seen a blackhole. I would be interested in > hearing more about it if anyone has collected any data around it. > > On 2022-04-13 19:28, Rob McEwen via mailop wrote: > > On 4/13/2022 6:58 PM, Jarland Donnell via mailop wrote: > > > >> Out of the 140,244 emails delivered to Google by my customers today, > >> not a single one has complained of issues with Google rejecting > >> legitimate email. > > > > Even so, keep in mind the following: > > > > (1) Their most egregious false positives - ARE delivered - they return > > a "250 OK" response - but then Google's spam filter does a 2nd round > > of spam filtering - AFTER the SMTP connection has completed - and > > that's where MOST of their most egregious false positives occur - > > partly because the sender THINKS that their message was delivered. > > > > (2) These are OFTEN the types of mistakes that are most often unknown > > to the sender - since the sender then never gets back a non-delivery > > notification. (and unfortunately not everyone is savvy and consistent > > with requesting and monitoring for "read receipts" for important > > hand-typed emails!) So then they don't "complain" to their mail hoster > > about a problem they don't even know exists! (so their lack of > > "complaints" is an inadequate/flawed measurement of success in this > > case!) > > > > For example, I have a close relative who was the CFO of a company a > > couple of years ago (with hundreds of millions in annual sales) - > > before he switched to another company - and what I'm about to describe > > occurred AFTER Google's huge move to going "all in" on A.I. for email > > processing - and so this company almost lost the renewal of a > > multi-million dollar deal because their client's hand-typed messages > > were getting 250 OK answers, but were spam-filtered after-the-fact by > > Google. The client thought that they were getting dissed by their > > vendor - since they didn't get non-delivered notifications for those > > emails - and so this client was already in the process of looking for > > a new vendor when someone at my relative's (former) company spotted > > the false positives from this client in the spam folder at the last > > "final hour" and just barely saved the deal. > > > > Of course, that's anecdotal and ALL spam filters have occasional > > egregious false positives. But it's just that your "delivered to > > Google" might not mean as much as you thought that it meant! It's > > possible that a few of those 140,244 emails might not have made it to > > the inbox! > > > > -- > > Rob McEwen, invaluement > > _______________________________________________ > > mailop mailing list > > mailop@mailop.org > > https://list.mailop.org/listinfo/mailop > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop -- Al Iverson / Deliverability blogging at www.spamresource.com Subscribe to the weekly newsletter at wombatmail.com/sr.cgi DNS Tools at xnnd.com / (312) 725-0130 / Chicago (Central Time) _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
