My accounts in Mail app stopped to sync post update

Oct 2 I just did this and it worked...

Did anyone else receive this (supposed to be actioned before Sept 30) regarding Hotmail/Outlook etc:

The safety and security of your information is top priority for Microsoft. To help keep your account secure, Microsoft will no longer support the use of third-party email and calendar apps which ask you to sign in with only your Microsoft Account username and password. To keep you safe you will need to use a mail or calendar app which supports Microsoft’s modern authentication methods. If you do not act, your third-party email apps will no longer be able to access your Outlook.com, Hotmail or Live.com email address on September 16th.

What do you need to do?

If you are receiving this email, you are currently using an email or calendar app that uses a less secure authentication method to connect to your Outlook.com email account. You will need to upgrade your third-party mail and calendar app to a version which supports modern authentication methods.

Microsoft provides free versions of Outlook for your PC, Mac, iOS, and Android devices which can be easily downloaded and connect to your email account. Using an updated version of an Outlook application will ensure you are connecting in the most secure way.

How can you set up your Gmail, Apple Mail, or other third-party mail application?

Various non-Microsoft applications will have their own steps for connecting to your Outlook.com email account using modern authentication methods. See our help article - Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps. However, you may need to contact the creators of those applications to provide you with instructions. In many cases, simply removing and re-adding your account with the latest version of that application will configure it to use modern authentication methods.

If you can take a look at your mail server settings specifically the IMAP and SMTP. Make a note of the values and delete an overwrite them also check your passwords for both SMTP and IMAP. Make sure they are the same if you can’t see them look at the number of stars or dots. Look at the mail server settings boxes for password and port settings they’re the ones you need to delete and reapply.

Same here. Update iOS 18.0.1 did NOT fix the issue with IMAPS and the Apple Mail App - sad!

On a side note - MacOS 15.0.1 broke my Apple Mail app on my M2 Mac Mini (worked perfectly fine under MacOS 15). It now crashes when trying to open the app...looks like things are getting worse instead of getting better...

if you have mutliple google with their oauth accouns and multiple imap accounts ... how long takes to reconfigure them with "may be luck happens" option ??? apple show their smartness already Month ...

It's October 15th and I'm running the latest iOS 15.0.1. The Mail app is not working properly. Some emails won't load, and others are not updating my sent emails. I've tried deleting and re-adding my accounts following all the correct steps, but nothing works. I didn't realize this was a known issue for many users. The Mail app is very important, and I really hope Apple is taking this seriously and will fix it soon.

Did you already force restart your iPhone?

Force restart iPhone - Apple Support

Same issue. I deleted apple mail app, reinstalled, added account again. No fix. Can send email but no syncing with server.

i then installed 3rd party email app. Works perfectly.

@coolgrljen

Did you check if the password for the incoming mail server is still listed in the Mail account settings?

Did you try to set up the Mail account again?

@Fai545

Did you deinstall the Beta profile before updating to the official iOS 18 version?

Is this a 3rd party mail account?

Can you see your mail if you use log into your Webmail account?

If I go to my email website thru Chrome on my iPhone, I see all the emails coming in. But nothing but junk mail is coming in on the iPhone Mail app.

So you are using a 3rd party mail account and not iCloud Mail?

If yes, try to delete the account and set it up again.

Same for me but only with my mydomain.com . I have tried everything I could think of . OTOH no problem on my MBA with OS 15

Seeing the same, although a certificate that is signed by a private CA (that is otherwise trusted in iOS). The only workaround I have right now is to avoid IMAPS and fall-back to IMAP.

Thanks for the hint with the fallback to normal IMAP.