My accounts in Mail app stopped to sync post update

My email isn't working either. I can send, but I'm not receiving anything. I even checked my fetch email settings, put it on manual, but when I refresh my email inbox, nothing happens. I have also restarted my phone numerous times, but nothing seems to fix the issue.

Seems to be an issue with email every time Apple does an update.

same problem here, after updating to ios 18 my email was not working, error.

i deleted my account en then set it up again, all checks are good but not receiving any email

please fix

Everybody here should let Apple know directly about the details of their issue with Mail in iOS 18 by using the Feedback link. Apple does not follow these user to user communities.

Product Feedback - Apple

Feedback - iPhone - Apple

And each user should open a new thread for each issue, which can then be addressed separately.

I don't think this is a certificate / SSL issue. I can see the IMAP logins on target server logs. TLS Handshake and IMAP login is working, but the content of INBOX is not shown or synced to the iOS Device:

Sep 18 08:17:05 server cyrus/imaps[3361]: starttls: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits new) no authentication
Sep 18 08:17:05 server cyrus/imaps[3361]: login: <host> [<ip>] <username> plaintext+TLS User logged in SESSIONID=<cyrus-3361-1726640225-1>
Sep 18 08:17:05 server cyrus/imaps[3361]: client id: "name" "com.apple.email.maild" "version" "3818.100.11.2.3" "os" "iOS" "os-version" "18.0 (22A3354)" "vendor" "Apple Inc"
Sep 18 08:17:05 server cyrus/imaps[3361]: created decompress buffer of 4102 bytes
Sep 18 08:17:05 server cyrus/imaps[3361]: created compress buffer of 4102 bytes
Sep 18 08:17:05 server cyrus/imaps[3361]: open: user <username> opened INBOX

Apple has acknowledged all the mail issues occurring with ios18 and told me today the next update will address them. They said this could happen soon but didn't have an exact date.

I have just talked to Apple support, that tells me that they don't have received that many calls on this issue.

I'm told that the right way to report an issue like this is to, go to apple.com/feedback and sent in a Bug Report.

In Apple support, they don't have access to the developers who can fix these issues. So please everybody sent a Bug report to Apple so they can be aware that we have this mail issue.

It is also the request from Apple support.

After spending all morning with CC , I got it to work .

They had me :

-Erase all settings

• Delete not working email
• Add it again

Now it is working again but I have a long day ahead of me on iPhone and 2 iPads ....

I really hope this will help all of you too ;-))))

Version 18.0.1 is available on some devices, but the problem has not been fixed!

I tried everything, I uninstalled and reinstalled the mail probably 200 times. Each time after some time I get an "account error". But to make it interesting, when I reinstalled the mail, the mail works but only for an hour or max 2 hours and then there is an account error. before installing everything worked... Now I still used the mail on my old phone because it had iOS 17 - the mail worked there. But about 2-3 weeks ago there was an update to iOS 17 and then my mail was cut off. I love iPhones, I have had them for years but now I am so disappointed that I will not buy the iPhone 16 anymore. I will stay with the 15 pro. But only if they finally fix this bug. Because I really need the email for work.

[Edited by Moderator]

I tried to do a tcpdump between IOS 18 device and my mail server.

So, Layer TCP (SYN, ACK, etc.), TLS 1.2 (Cert, Cipher, etc.) and IMAP Proto all work. The mail application logs in IMAP and immediately logs out with EOF and back to the beginning. Meanwhile, the spinner runs in the app and the user no longer receives any messages.

So, the Mail APP looks for the contents of the inbox, but the device has already cut off communication with the mail server.

Weird thing is my junk mail is coming thru, but not anything into my main inbox.

its definitely IMAPS.

account settings > advanced

turn off use SSL, change port to 143.

Everything was still listed. My junk mail is coming in, but nothing into my inbox. I can send, but not receive replies to emails. It's weird.

I was told by Apple Support to continue using the Gmail App, until it’s fixed in a future iOS update. This is a problem that reflects only in some iPhone Models using exclusively the Apple Mail App for iOS 18.

@ingo2711 if you are referring to my comment --

I have deleted the account 20 times. I deleted the Apple Mail app from the phone, reinstalled from the App Store. it didn't help.

my comment about 3rd party email -- is a 3rd email app called Email - Edison Mail (from the App Store) I set up my mail accounts in the app and everything works as it should.

BTW - I never had the iOS 18 beta.

https://apps.apple.com/us/app/email-edison-mail/id922793622

The issue is with the Apple mail app.