Answers to various people who tried to help: 1. Yes, these hotmail e-mail accounts exist and work with e-mail sent from other means. I have 10s of incidents, hotmail.com rejects e-mails from [email protected] Incidentally, outlook.com works fine. 2. Again this has been working for years. I have 1000s of users, about 6% have e-mails in hotmail.com and only those bounce, and again this only started a couple of days ago. 3. Yes George, I have read the relevant documentation thens of times, the way it is now, and the way it was 1,2,3,4,5,6,7 & 8 years ago. Please read my initial e-mail carefully, this has been working for years.
I have opened a case with GCP support (Case #13973481) and waiting to hear back after the initial contact 10 hours ago. Yes, most likely it is an issue with Microsoft but it makes me and Google look bad with my customers because they can send an e-mail to these hotmail accounts from their Inbox but we cannot. On Thursday, October 19, 2017 at 6:53:15 PM UTC-7, PK wrote: > > Has anybody else experienced something similar, the message is of the form > below. Any suggestions where to start? It seems like an issue on the > Microsoft side but it happens only for e-mails originating at GAE standard. > > Your message wasn't delivered to [email protected] because the address > couldn't be found. Check for typos or unnecessary spaces and try again. > > > The response from the remote server was: > 550 5.5.0 Requested action not taken: mailbox unavailable. > > or > > 550 5.7.66 Requested action not taken: mailbox unavailable [HE1EUR02FT020. > eop-EUR02.prod.protection.outlook.com] > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/03115ed1-3dd2-48f5-8b7f-4428a101a806%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
