iCloud Mail not syncing across devices

Mail should be synced between ALL Apple devices not just between iPhone and Mac or iPad and Mac. I don’t own a Mac. I own an iPhone and iPad. This was never a problem before mid 2019. I used watch the notifications disappear from my iPad as I read mail on my iPhone. I should NOT have to go to each one and open the Mail app to clear them. There’s something wrong with iCloud services themselves because the same happens with reminders as well.

It's documented that people were no longer able to search their mail following a Big Sur upgrade. The solution was to rebuild the mailboxes and re-index Spotlight.

Perhaps trying to rebuild the mailboxes that fail synchronization might shed light on the issue since Mail.app needs to communicate with Mail server to re-build... thinking somewhat like synchronization. Here's something on the topic https://discussions.apple.com/thread/252495099

Hope proves helpful.

For no explicable reason my 3 devices using Apple mail are suddenly not syncing mail. Read/delete not corresponding between devices. All software updates, iCloud storage checked, iCloud setting checked, mail deleted then reinstalled on all devices. Have followed all Apple advice still not working 🤔🤔

There are a lot of Auto-updates throughout the Apple ecosystem. Is it possible to list all hardware device models, along with MacOS and iOS versions?

Sometimes looking at the list and doing simple internet searches reveals the solution...

In my opinion, Apple and the Community will help you find answers.

For God's sake, Apple - I even have problems notifying you about problems. After 15 minutes, I'm back here again trying to convey what I tried to update:

Mysteriously (without any intervention) my mail is syncing better. This is the second time in a month it's been grossly off, then almost back to normal. I have no faith this has been resolved as I've had too many serious issues lately and Apple seems more and more unreliable.

1️⃣ The first [possible] resolution came by way upgrading to macOS 10.15.6. Problem resolved itself shortly thereafter (later, re-presenting). A legacy Mac user, I am gun shy about initiating updates. I see little benefit these days in new releases; more frustrated with features that are taken away.

2️⃣ The second [possible] resolution came by way of restoring my MBP to power 24/7. I eliminate standby mode completely, only reducing brightness or turning off the monitor (docking station or laptop). The goal is to use my desktop as the primary mail authority (reading, moving, deleting, sending) and let it push to the server and down to mobile devices. By leaving it running, there's no reason why is shouldn't be processing in real-time.

Mail seems to be frequently hung "moving messages." It's also not uncommon to see the status bar (bottom left) waiting to process income or outgoing messages. The past few weeks, I'll receive an error dialog that it failed to move a particular message to a mail box. 🙄

Apple, I try to be a highly organized and efficient professional. You royally make a mess of people's lives when basic, fundamental processes stop working properly.

Hi,

I solved my issue after 2 simple steps :

1/ de-actived and re-actived email sync in iCloud settings => did not fix the problem

2/ de-connected and re-connected iCloud account on iPhone => fixed the problem :-)

Only painful point was that I had to re-activate all my payment cards in Apple Pay.

Hope this helps

I am so glad to know that this is a problem for someone else. However, mine is a little different.

If I read a message on my iPhone, it gets marked read on iCloud.com but not my iPad. If I read it on my iPad, it will get marked as read on iCloud.com but not on my iPhone. If I read it on iCloud.com it will not get marked as read on my iPhone OR my iPad. This is an issue I have had since mid 2019 and iOS 12. I used an iPhone 7 Plus with an iPad 2nd gen. I have used am iPhone 7 Plus with an iPad 6th Gen. I am now using an iPhone 11 Pro with an iPad 6th Gen.

No matter the combination of devices, the only time the Mail app will update is when I open it on BOTH devices which defeats the purpose. So frustrating.

I have been in touch with Support and a Senior Support Rep who was supposedly working with the engineers. Somehow, that communication has fizzled out and the last 2 messages I sent to him have gone unanswered. I have a case number and everything.

Mails are only synced ( mirrored ) between iPhone / Mac when same Apple ID and password are signed in on the same network the Apple ID say should be example1@icloud.com

When ever a mail is deleted from a single device it will be deleted from its hardware address and not deleted from another device it could be Mac / iPhone and moved to bin folder of the web account / and simultaneously in IMAP accounts .

See these https://support.apple.com/en-us/HT208661

https://support.apple.com/en-in/guide/mail/mlhlp1001/mac

I’ve been living with this Dilemma for years now, I can assure everyone no matter what Apple Support say, the Mail app WILL NOT sync delete, read and flagged Emails until you open the Mail app on each device and pull down to sync OR has the device connected constantly to power.

WE NEED A TRUE FULL ICLOUD SYNC FOR MAIL. I can’t believe Apple could not do that for all those years!! Really!!

why should I go to 3rd party app and compromise my security to get the full sync feature??

I agree. I have reverted to using Gmail on my phone instead of Apple mail. Gmail syncs perfectly with Apple Mail on the Mac, so the problem is clearly with the iPhone Mail app. Apple is losing my support. I have changed to Google Chrome and Gmail from Safari and Mail, which have served me well for many years until last month. The problem is with Apple.

Same issue. No resolve (or when I do, the problem returns).

I receive over a hundred or more [legitimate] emails a day. I check my phone dozens of times a day, moving messages to specific folders, flagging, reading and replying. I RELY ON APPLE TO KEEP THIS IN SYNC. Now I'm left with a quandary: wait to read and sort messages in macOS, read and sort messages in iOS, or painstakingly try to manually keep both in sync.

I fixed this problem updating to the latest macOS two weeks ago. Last week I encountered problems again that persist to this day.

There is no reliable solution (signing in/out, updating, turning off/on) and Apple's integrity in the matter is at stake. I am trying to run a business and manage critically ill patients. Apple, this is maddening.

I've been using iCloud Mail for years now. I have an iMac, iPad and iPhone 11 Pro. About 3 weeks or so ago, my email stopped syncing. All devices receive the emails, however; when I delete or read emails on my iPhone, this doesn't sync with my other devices. I haven't made any changes to my accounts to cause this, so I am at a loss. I've tried signing out of iCloud on all my devices and then logging back in, to no avail. If I go to iCloud.com and read/delete emails, then my devices will update.

Please help!!

Keith.

@William Franklin

Couldn't have said it better. Prime example, numerous people want to continue using some very good 32-bit programs, but they will not work with the Macbook upgrades to 64-bit. If anyone comes up with a work around it would be greatly appreciated. I know this is off-topic and apologize, but it relates to the issues with Apple upgrades, so please excuse my diversion ;)

Thanks for the update! I tried this, and alas, no avail! I'm curious if this was an iCloud issue for you or do you use Gmail? Mine is not syncing Gmail. I'm having to use webmail now so that I can keep my account synced between devices and I hate it! :)

Called apple support and the first guy totally got the issue, had me try some stuff that people here have already listed and that I had already tried. No dice. He bumped me up to a second tier ‘engineer’ who insisted on fixing a problem I did not have. He could not focus on what I was saying the issue was. He knew exactly what I was ‘trying’ to say and I could not get him to budge from his assumption. After an hour and a half on the phone I had other things to do and just said ‘Thanks, you were a huge help’ and hung up. Email accounts are still not syncing across devices. More frustrated than before because now I know that no one has an answer. I get dozens of emails a day and having to delete and sort them on each device is time consuming. I may delete the accounts on all but one device and only use that one device to handle email. Most inconvenient. My issue only started about three weeks ago, not like others in this thread who have had the issue for a year or more.