imessage gives error "not delivered," even when sending to an iPhone and the message does get delivered

No solution yet (the comma or other tricks aren't consistent).

It seems the bug got introduced when messages went into the cloud - there seems to be some sync issue across devices / accounts now. No fix that I have been able to gather or read anywhere, so hoping Apple is addressing it with an upcoming OS/iOS update....

Hi,

I have not seen that before.

As a matter of interest does it happen that you are in the United States and they are in Australia where it might well be "tomorrow" already ?

One suggestion that some people claim has worked for them is to open Keychain Access (Applications/Utilities) and Lock then Unlock the Login Keychain.

This has been posted by another Poster who's name I have forgotten (Mindez ? or Mindoz ? or similar.

7:47 pm Wednesday; September 19, 2018

Nope. Still going on, still inconsistent. On my end it’s happening on all the Macs but no longer on the iPad and iPhone.

It’s some bug with the sync, started with iCloud messages.

Wvillagegealex,

I am having almost the same problem, but it is intermittent. Most of the time, I get the annoying "not delivered" error, and I know the message got delivered, as it was replied. Than, other times, for the same number and sometimes about the same time, message gets a reply that it was delivered. So, I am skeptical it has something to do with my Mac's serial number, as why it would be intermittent? Any other suggestions?

Cheers,

Acacio

I had this problem. Went to "genius". No help. I finally figured out that it was Apples -- ill-conceived "safety" system that had things jammed up. Somehow, I had not given appropriate "OK"s on my other devices, so I was prevented from using iCloud.

To make matters worse, Apple has offered up a meaningless error message. "Not Delivered" is the error message. Really? That doesn't help much. Perhaps a clue or two as to WHY it was no delivered. I was stumped, the senior Apple advisor was stumped, the Apple store genius was stumped.

It took me many hours of time chasing down "fixes" that were a waste of time.

I used to honor the way that Apple treats the end user. Not so much any more.

Bill

mesh-arc is exactly right. The problem is new and exists in conditions that are the same when previously it did not exhibit that problem.

It is inconsistent in that some threads will show it and some won't. Sometimes it will happen on a thread and later it doesn't. And yes, the message does get through because it shows on other devices and the person responds to it.

It feels as though it is a communication issue with Apple's Message server in sending the wrong flag.

Hi,

Syncing only works if one of your copies of the Address Book/Contacts App contains the Country Code.

There are Scripts out there that will do multiple Contacts at once.

8:58 pm Wednesday; May 16, 2018

Try turning off text message forwarding in Settings > iMessage. This worked for me.

I resolved the issue on my machine. Find my post above. I believe I reset the pram.

Hi,

If the Blue Messages are not seen or sent then it is about the Login to the iMessages Servers.

If like the person below your Post it is the Green bubbled ones then the Text Forwarding so you see SMS or can Send SMS is the way to go.

9:25 pm Wednesday; February 21, 2018

I might add...

• It is only happening on my iMac running 10.13.3. Pretty sure it is not happening on iOS devices.
• Problem started around March 10, 2018 or later (rough estimate).
• No issue with "send as text" or green bubbles at all.
• Despite error alert, recipient does receive and reply to message.

Same exact problems here. Mac and phone have worked for ages, including all recipients. Now messages are showing up as "not delivered" on my Mac, even though they are.

Also messages are out of order now. All sent messages are together and all received are together; it's as if there's some kind of time synchronization problem present as well.

I'm having the same problem 😟

I'm already on macOS 10.13.3. However, I updated almost a month ago and this issue is recent (last day or two).

Tried turning Text Forwarding off and back on.

Tried logging in and out of iCloud account in Messages on Mac.

Still experiencing this problem. 😟

I have exactly same problem. iMessage on 21" iMac say "undelivered" but person does receive message and responds and I see their response. I am on most recent update at version 10.13.3

Anyone have any answers how to correct?

I have the same problem. My MBA, running 10.13.4, shows the iMessage as "not delivered". In fact, it has been delivered. The recipient says so and my iphone shows the message as delivered. It only happens with some iMessages, not all. No logic to time or recipient. This problem started a few weeks ago. Late-May 2018.