Emails to Hotmail.com are disappearing ~ neither delivered nor bounced back.

[#1]

I note that there is a separate topic regarding outgoing emails which are being rejected by Hotmail.

My situation is slightly different in that, for the some weeks, emails (previously sent successfully)  to  Hotmail addresses have now simply disappeared into the ether ~ they have neither been delivered nor rejected.

OK, my short term solution is to copy in  family members with other email addresses, but is a solution at my end or do I simply wait for the issue to be resolved?

Thanks.

[#2]

Hi @CSG.

I've checked with this one and it is likely linked to the same issues as the other reported delivery failures. 

We've fed this back, so please keep an eye out, and if you're still having trouble once the wider issues are confirmed as resolved, please let us know and we can take another look.

Peter

[#3]

Hi  @Peter_JW 

Thanks for the prompt and helpful response.

Much appreciated.

[#4]

@Peter_JW 

Following my original post I have discovered why the outgoing Hotmail email ~ rejection notices have, very recently, not been reaching me!

On using Webmail to log onto my "transitioned to  Greenby" account (from February 2026) I found 35 items within the Spam folder which had not been passed onto my Outlook email  account ~ whether the Inbox or Spam folder !

These included the outgoing Hotmail email rejection notices, recent monthly bills from Octopus Energy and various other innocuous emails

I have turned of the Greenby Spam Filter so that I may, hopefully, see all incoming emails ~ including those designated as Spam within my Microsoft Outlook account.

[#5]

I'm of the opinion it is a bit more complex than that.

Reasoning.

I have sent e-mails to a MS-type "webmail" address. They were not delivered, and neither were there NDRs.

I do not use Plusnet or Greenby e-mail.

Since there were no NDRs, the only other reason I can think of is that my e-mail provider is not entertaining NDRs, and is sending them to the bitbucket.

I have tested this scenario, and have NDRs.

(My) Bottom Line.

MS have been sending some incoming mails into their bitbucket(s). The recent news that MS are now sending out NDRs does not negate the original problem. At least an NDR is reporting a problem.

[#6]

@CSG 

I presume you're using IMAP rather than POP3 for incoming mail?

Are all available email folders subscribed (many of mine became unsubscribed when I was migrated)?

Can you confirm that that doing Send/Receive All Folders in Outlook doesn't download the Junk/Spam folder?

[#7]

Re the Hotmail issue…I sent an email this morning to several people including three with Hotmail addresses. No problem with the others receiving it but the Hotmail have all bounced back with a “failed permanently” message. I have a Totalise email address. Can anyone help? I also had this issue with an outlook address yesterday. 

[#8]

Me too. For the last three days emails sent to Hotmail and Outlook addresses have received the same 'undeliverable' bounce backs, whether sent individually or as part of a group mailing. This seems like a repeat of the long long saga from last year 'From address doesn't meet the authentication requirements defined for the sender' (currently up to 835 posts), which did seem to be fixed. Anyone else?

[#9]

I'm surprised that it's only been 'the last three days'. Are you actually receiving a bounce back message as in last year's thread to which you refer, or is it more like this one Hotmail rejecting mail from PN [Diagnostic-Code: s... - Plusnet Community which as you can see has been going on for the last few weeks?

[#10]

I've probably only tried to email such addresses fairly recently. They aren't among my most frequent correspondents. It might be longer than three days, though I suppose that was when it began to 'impinge' on me.

No, I definitely do not get those long bounceback messages about block lists, that are referred to in the thread you have highlighted. My bouncebacks are the simple "Reason: A message that you sent to the following recipient could not be delivered due to a permanent error. ** The remote server ?? responded with: ** xxxxxx@outlook.com ??:?? This message was created automatically by mail delivery software on the server ".

By the way, I see that the 'block list' thread does contain a number of posts that actually refer to my problem rather than the original one. It's become a bit confused/confusing (not a criticism, I know how hard it can be to identify a specific targeted thread to add to!)

[#11]

Are there any attachments to the bounce back message? If so, the detail is in there.

[#12]

Yes, there is, and I hadn't checked it. Thank you for the hint. Details.txt does contain this sentence: "Please contact your Internet service provider since part of their network is on our block list (S3150)." I don't know if that was also the case with the previous problem - I'm afraid I don't usually check such attachments. Will try to remember. Thanks again.

[#13]

@CSG  same issue here. No bounceback error message. We've only just found out emails sent several weeks ago have disappeared into the ether.

[#14]

@balvack2 

Since turning off the Greenby spam folder setting via Webmail, the outgoing Hotmail email rejection notices are at least ~ again ~ reaching me!

[#15]

@CSG 

Since turning off the Greenby spam folder setting via Webmail, the outgoing Hotmail email rejection notices are at least ~ again ~ reaching me!

Presumably you are saying that the rejection notices now come to your Inbox but are you saying that before you turned off the Greenby spam filter the rejection notices were invisible, rather than being put in your Spam folder?