Mail not working on iPhone after iOS 18 Update

You really DO need to contact your relevant external (external to Apple) email service provider about the problem; for me it was a behind-the-scenes fix that Comcast did - at least on my Comcast email accounts - that permanently resolved it. If your provider’s customer service or tech support rep says they have no idea what you’re talking about tell them to escalate it in order to work it out with Apple. I made only 1 call to Comcast about it and was told they were aware of the problem and expected to have it resolved within 24 hours (which they did, although as I recall I found that I did have to delete and reinstall my Comcast email accounts within iOS mail to complete the fix at my end once Comcast completed their work on it).

THANK YOU for posting this. I DO SEE a greyed out “/“ and I’ve followed your very good step by step instructions (I’m technologically challenged).

Hopefully this will stop my “flashing” stuck emails when I’m trying to read all of my incoming mail.

(Apple probably has so many glitches they don’t know how to fix with every new update…)

It only worked for the first time after upgrading to 18.1. Now, I couldn’t fetch emails from my IMAP server again. Strangely, sometimes new mails were fetched time to time. Also, all the other folders synchronize flawlessly.

Imminent?

No, I do not think so. As I have an open ticket with Apple Support, they would have contacted me if they had any good news. At least, I want to believe that they would have done so.

I will try to ask them if they have any news next week.

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?

Correct and congratualtions. I’ve been telling folks here to contact their IMAP mail service providers to get the needed support and updates right from day 1, Apple support staff *should* be telling them to do the same but apparently are not. And updated info needed from all of the various providers can and often does differ from one provider to the next, unfortunately.

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!

I received the answer from my email provider, that the IMAP issue is caused by a bug in iOS 18 and iPadOS 18.

They suggested to report my problem to Apple and shared the following article, as it is a known issue:

[Edited by Moderator]

This works for me:

I get my IMAP email only to work once, after I reboot my iPhone (18.2 EU). Not really the best way. For now I am using webmail via browser, but I would really appreciate a fix asap.

We tried annelle204's solution (and multiple similar iterations) on all of our iOS18 updated phones and this did not work.

It’s near the bottom in advanced mail settings. /