Email issues after installing IOS 15.5 on my iPAD

Given that you have already reinstalled iPadOS - and restarted your iPad - the issue may perhaps be due to your WiFi Network/Router settings, or your iPad settings having unexpected difficulties with your Router setup or ISP.

Recommended settings for Wi-Fi routers and access points - Apple Support

As an initial step to localise the cause, try joining a completely different WiFi/Internet connection. If the iPad performs as it should when connected elsewhere, the list of possible causes becomes much shorter. By contrast, of the problem persists with other networks, then we need to look closer at your iPad setup.

Have you tried connecting to your iPhone hotspot - this being an alternative internet connection to which you have immediate access? Perhaps a friendly neighbour will allow you to “borrow” a WiFi network connection?

A simple restart of your WiFi Router may also be worthwhile - as the Router can often impact performance of one device while other devices may appear to offer expected performance. To restart you home router, disconnect power - then wait at least 30 seconds before restarting. When you router has rebooted (which may take several minutes), force-restart your iPad:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On an iPad with Face ID: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.

Are you using the new WiFi Private Address feature of your iPad? This feature is intended to provide additional privacy and security when using “public” (untrusted) WiFi networks.

Settings > WiFi > [Your WiFi Network / SSID] - tap the “i” icon - Private Address

The Private Address feature is largely unnecessary for your home WiFi network; if enabled, Private Addressing can have unanticipated consequences and/or interfere with operation of some services. If only as a diagnostic test, you may need to disable this feature. Private Addressing can be enabled or disabled for each individual network.

Use private Wi-Fi addresses in iOS 14, iPadOS 14, and watchOS 7 - Apple Support

My customer's iPad was on 15.6 with this issue. The first thing I always check is for updates and the IOS version. I am not talking about removing it in settings, this did not work for me either. I deleted the mail app entirely and when I re-downloaded it from the app store the issue was gone. I think he had a bunch of drafts opened and it caused some kind of crash, at least it looked that way. I am guessing a restore would have fixed it as well but I did not want to do that unless I had no other option.

Deleting and reinstalling did not solve the issue for me and many others. iOS 15.6 fixed the issue

Having updated to iPadOS15, you have now encountered the “Shelf” - this being a new feature of the now revised iPadOS multitasking environment. 

The iPadOS multitasking environment permits you to run multiple “instances” of the same App, such as Mail - with each instance, perhaps having a different open inbox. Each open instance/folder/message is represented by a thumbnail image - visible in the associated App Shelf.

For example, if you have three running instances of Mail, tapping the icon you describe will open the shelf with three thumbnails - each corresponding to each running instance of Mail. Simply tapping a thumbnail will switch directly to that running instance of the Mail App.  Swiping a thumbnail off the top of the screen will close the associated view/instance.

This article from Appleinsider has a useful explanation of this new feature along with many of the updates to multitasking:

https://appleinsider.com/articles/21/08/12/how-to-master-multitasking-on-ipad-and-ipad-pro-in-ipados-15

The iPad User Guide is also a rich source of frequently overlooked information. The Guide is available both online using a web browser (such as Safari), or as an Apple Books download:

iPad User Guide - Apple Support

https://books.apple.com/book/id1567104892

If you are experiencing difficulties, begin by closing all of the open Mail windows - one by one - and then exit the Mail App altogether.

Ldaniells1 wrote:

This needs to be fixed, and SOON.

I’m almost to the point of ditching the IPAD completely if this continues.

Update your iPad to iPadOS 15.6.

Most report that the issue has been resolved by this update.

I had the same problem until I updated to 15.6. Even though I have automatic updates installed, it did not automatically update it and in fact no information was shared. I was getting ready to get a new iPad which might be what they were after. Then Kevin a friend called and got the suggestion to try 15.6 which worked.

I had a customer with this issue on an iPad Air 2. It looked like a bunch of email drafts were opened, I am not sure if that was not the case as I have done this myself without realizing they were still open but minimized. Anyhow, I tried everything and nothing worked until I deleted the mail app and re-downloaded it. I tried hard resets, resetting all settings, turning mail off, removing the account and re-adding but none of it worked. I did not realize you could delete the mail app, but you can. I downloaded it and the issue was gone. I hope this helps someone else.

Having exactly same issue on my IPhone 13 pro max since updating to 15.5. Email app has now become completely unusable. Tried reboots, reinstalling etc. Now deleted the app and installed Outlook instead which works no issue at all. Completely unacceptable that a key app should have issues like this and no acknowledgment from Apple.

I was delighted to find this resolution..I was almost ready to abandon my iPad Pro. I only wish that Apple had acknowledged this issue so we would have know that 15.6 was the cure! Makes me start being distrustful!

After updating to iOS 15.5 - especially on my iPad mini - email images don’t open immediately. Sometimes I have to close out the email app and even close down the iPad. Then images generally open in the Apple mail app. It’s very frustrating tho.

I am having the same issues with my iPad Pro. I have IOS 15.5 on my iPhone 12 Pro Max and the email works fine. The problem is only affecting the IPad and we definitely need a fix. Please do some testing on the apple end as it is not a network issue or other issue. I have been on various networks in Tennessee and currently on a different network in Florida and still have the same issues. Thank you, Linda

I did notice on my iPhone 12 Pro Max if I go to settings, mail, accounts, click on the iCloud email, icloud, icloud mail then there is an option to toggle on or off to send and receive email using your @icloud email address; I have it toggled off and email works fine. However, on my IPad Pro 12.9 3rd generation when I click on icloud mail it takes me back to the Home Screen so there is not an option to toggle off and on whether you want to send and receive mail from you icloud mail. (Just wondering if we had an option to toggle off would that solve our problem,; just a thought.)