Mail not working on iPhone after iOS 18 Update

Ok I have ios 18.1 just updated last night. I followed the path you listed above and all I have under advanced settings from top down is:

-a toggle for [Use SSL]

-Move deleted messages into: Deleted Mailbox or Archive Mailbox

-2 choices under S/MIME:

-[Sign] can choose either Yes or N

-[Encrypt by Default] can choose either Yes or No.

There is no field for IMAP Path Prefix under any of my mail settings.

I am as well, having trouble Sending mail using IOS 18 with the Safari App. With me,

every time I try to send an email, it “bounces back,” saying I have the wrong

forwarding address/to address, when I type that address in by hand. It is

very frustrating. The problem is with my iPad.

Sincerely,

Steph3639

I have the same issue, my iphone is sending emails, saves email in sent folder on iphone, but not on imap server, so it is not shown on my other devices. Very frustrating. Have been on my email providers support and apple support for hours and still it is not working.

Just done the 18.1 update and tested the emails again and it’s still not working. I have deleted both the app and my email accounts and reinstalled them, this made no difference. My emails only drop in if I open the app or plug my phone in. I get no notification dings. No acceptable Apple, this is a basic function that is not working.

Hello everyone,

Upgrade from IOS 17.7 to IOS 18.1

I have several IMAP mail accounts. All work well except one, my business account (Zimbra):

Only the sent mailbox is not synchronized when sending from the iPhone (if sending from a Mac, also in IMAP, the sent mailbox of the iPhone is updated).

I've tried everything, nothing works. Do others have the same problem with IOS 18.1?

Still have a problem with self signed certificate after upgrading to 18.1

Using sendmail 8.17.1 and dovecot v2.3.20

The mail client error is "Posix 50" and/or "invalid certificate format -9 808"

Delete / added the account multiple times.

Other mail clients works fine, Bluebird (IOS),stock mail MAC Airbook (Sonoma 14.6.1)

Bluebird (Fedora FC40)

here is the essential from the dovecot log (ssl debug)

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x10, ret=1: before SSL initialization

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: before SSL initialization

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2002, ret=-1: before SSL initialization

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: before SSL initialization

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS read client hello

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write server hello

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write change cipher spec

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: TLSv1.3 write encrypted extensions

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write certificate

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: TLSv1.3 write server certificate verify

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write finished

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2001, ret=1: TLSv1.3 early data

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2002, ret=-1: TLSv1.3 early data

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2002, ret=-1: TLSv1.3 early data

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2002, ret=-1: TLSv1.3 early data

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2002, ret=-1: TLSv1.3 early data

Nov 07 07:18:17 imap-login: Debug: SSL alert: where=0x4004, ret=558: fatal certificate unknown

Nov 07 07:18:17 imap-login: Debug: SSL: where=0x2002, ret=-1: error

Nov 07 07:18:17 imap-login: Debug: SSL error: SSL_accept() failed: error:0A000416:SSL routines::sslv3 alert certificate unknown: SSL

alert number 46

My problem started post 18.1 update. Extremely frustrating! Nothing seems to work except turning WiFi off. Messages load but when you turn WiFi back on, no messages. I have also noted gmail folders are gone since I deleted and reinstalled. Also, if I delete messages in Mail, it’s not syncing through to 2 iPads. Everything has to be done manually!

No its not. Adding "/" makes no difference on my iPhone15 Pro. Still no iMAP connection - will move to AirMail. Works perfectly and their Customer Service is first rate. Apple ... writing Software in Mumbai is a disaster. Not only is the Apple Software degraded but Apple's Customer Service to bugs becomes non-existent! What do they do there all day? Drink tea??

Hello, there are thousands of Apple users who since they updated to IOS 18, the company emails do not load, they do not arrive well, they do not load files as PDF and they have been there for 2 months and they do not provide a solution, regrettable on my part in January I will buy the SAMSUNG S25, because it has never happened to me on IOS and for me it is very necessary that the email works perfectly

Hello, there are thousands of Apple users who since they updated to IOS 18, the company emails do not load, they do not arrive well, they do not load files as PDF and they have been there for 2 months and they do not provide a solution, regrettable on my part in January I will buy the SAMSUNG S25, because it has never happened to me on IOS and for me it is very necessary that the email works perfectly

Yahoo Mail -

1. Mail Does Not Sync all folders IF those the Folders ARE sub folders of the INBOX.
2. Mail Does Sync all folders IF those the Folders ARE NOT sub folders of the INBOX.

To test this log into your Yahoo mail account in the Web App ( Not Mobile app or iphone )

Note that this does not allow you to create a sub folder of the INBOX.

Try creating a New Folder which will be at the same level as the INBOX, you will note that this fold will appear in Mail on you iphone.

All of my folders that failed to sync in Mail were subfolders of my INBOX.

In the Yahoo Web App, I created a TEMP folder that was at the same level as the INBOX, not sub folders of the INBOX.

Moved the subfolders in the Yahoo Web App to the new TEMP folder.

Recreated the Folders In Needed

Moved the SubFolders to the newly recreated subfolders.

OK it was a lot of work!

I approached it slowly until I understood it and there is a little more to it than the simple instructions above, but you should get the drift. I did a little at time.

Once moved, the folders populated in Mail/IOS18. New emails received today were moved to these folders in Outlook on my PC, were received/populated as well in the folders on my iphone IOS18 on MAIL

Should Mail work without doing this? Absolutely!

Do you want to wait for Yahoo and/or Apple to fix this? No I did not want to wait for some unknown update....

Try it, it might work for you. I'm retired and had time to make the above changes to my yahoo account.

Good Luck,

I've just updated to iOS 18.2 (v4). The issue persists.

I've tried the earlier discussed workaround of explicitly adding the forward slash to "IMAP Path Prefix" in the incoming settings, this unfortunately doesn't fix it for me.

I can send email, just not receive it.

Yesterday, I updated to iPadOS 18.1. Today, one of my Gmail accounts stopped retrieving mail. Looking at the email download history, it looks like mail for this account stopped downloading after I updated to iPadOS 18. “No problem“ I thought to myself. “I’ll just delete the account and reinstall it.“ But mail won’t let me add the account. Come on Apple. Fix this problem. Luckily, I have Outlook, an email app that, while clunky, actually works.

I recently updated to iOS 18.1 this weekend to try fixing a HomeKit problem (constant notifications about cameras "motion detected") and now my IMAP email account isn't updating anymore either. I've tried all of the suggestions posted but nothing is working.

Same with me it’s infuriating why can’t mobile data get this stuff like it used to go it’s exasperating I need to send messages and see what I sent before bug it refuses to down load anything I don’t have wifi access or power to plug into how could such a basic problem happen every update its sone darn headache we rely in these devices it simply isn’t good enough