Mail not working on iPhone after iOS 18 Update

I didn’t pay one 1k for a phone to have to do all the technical rubbish on here being suggested. It has gone belly up since that update it might be

pure coincidence but I find that hard to swallow quite frankly

i find that mail on IOS 18 can be at times extremely slow. You can see the headers but sometimes there is a huge delay to be able to read the text. You do not see that delay using outlook as the email app. It really should be fixed.

mikefromfort wayne - FYI you have repeated what some others have already posted here as a “fix” and which has already been tried by MANY others - myself included - to no avail, at least not as a permanent fix. In many instances the actual source of the problem appears to be much more complicated, not correctable at the consumer’s end, and it turns out that the problems with Mail in OS 18 are not the only problems that people are encountering within this OS version.

I wish I was as lucky as you. You should go buy a lottery ticket. My new iPhone 16 Pro Max is buggier than the Amazon rainforest. I have tried every fix suggested to me by Apple support, and nothing has worked. This has been an issue since I got my phone, two weeks ago. The native mail app works fine, as long as it is connected to a power source. When not connected to a power source, I have every single mail issue that has been mentioned in this thread.

I’ve resolved some of the Mail app issues that arose after updating, but still seeing a lot of NO SENDER NO SUBJECT headers, especially on gmail now. It’s annoying when you get search results that are virtually unusable because you have to click each mystery mailing individually to find out who it’s from and what it’s about. (The content of the mailing is intact, it just doesn’t show up in list view. This glitch appeared with the iOS18.2 update. The ones below are all from different commercial senders… anyone else seeing this, too?

artwire - I have seen similar if not identical problem since 18.0. It looks to me that it’s an Apple Mail *processing* problem resulting in the processing of extensive incoming email being MUCH slower than it ever was under prior iOS versions, possibly caused by inadequate device hardware (given new “overhead” requirements?), OS bugs or otherwise poorly written relevant OS code, and/or overloaded Apple Mail servers (as far as I know all email going to Apple devices come in to us through such servers) or a combination thereof. From what I’ve seen it is not caused by the originating email service and is not evident on Macs running the current MacOS.

Been dealing with Apple Support on the phone for the last two days. After trying all of the fixes the tech support guy could think of, and still no joy, he had me send them all the code from my iPhone 16 Pro Max, and it’s being fwd’ed to some higher up department within tech support. I’ll be getting a call back on Friday, at 5pm EST.

This did not work for me. IMHO we should not have to go through all these technical acrobatics for the Mail app to work properly.

Apple needs to fix this bug. This was caused by their update to iOS18.

I apparently downgraded from an IPhone 13 to an iPhone 16 Pro Plus and as a result response time is terrible especially email. I’ve been an iPhone user forever and the response time on this phone is the worse!! Wish I had my $1200 back as well as my 13!!

Indeed. I want to turn my iPhone 18 + back on, and return my iPhone 16 Pro Max. My 18 + ran as smooth as waste from a goose’s behind. My 16 Pro Max, on the other hand, is buggier than the Intelligence Community.

I do not even have VPN installed on my iPhone 14. So, that is not it.

I am running iOS 18.2. The Mail App stopped working when I moved from 17 to 18 last month. (Moved to 18 first on my work iPhone 13, and email worked there, but since we are only authorized to use Outlook on the work phone, I did not realize the Mail App issues until I updated my personal iPhone. I can still get email via my Outlook and Gmail Apps, but since many other Apps auto-launch the Mail App for MFA, this is really burdensome.)

Unfortunately, I can confirm that update 18.2.1 still doesn't fix the synchronization problem with some IMAP servers. And all the martingales and miracle recipes read here and there change nothing. As a reminder, and I've checked again, synchronization with an iPhone running iOS 17 works perfectly.

What is Apple doing despite thousands of complaints to customer services all over the world?

It's totally crazy!

My problem is a little different. I can receive mail bug cannot send it. It says my password is incorrect even if I reenter it.

i have restarted the app, reentered all the settings anc password, restarthe phone, nothing works.

Any ideas?

Apple needs to explain what is going on. My isp is not going to act just based on a user complaining about mail. The only client that is broken is IOS 18 mail. If Apple knows what server feature they are trying to use which does not work right with all servers provide an option to disable it! Today my IOS mail became totally dysfunctional. Other days it is fine. When it’s dysfunctional all other forms of mail clients work fine.

While I agree that grumbling in this thread is not productive, your opinion that "Most people are not having a problem with Mail so it is either unrelated to the upgrade or the result of an uncommon confluence of circumstances" is uninformed and even less helpful.

It is the rare bug that impacts "most people", and that is hardly the measure of whether a bug needs to be addressed. If a serious bug affected you, I doubt you would be so charitable. There is certainly a bug in the upgrade that suddenly broke email from, among others, dovecot servers. Some of us have been able to get by with workarounds, but the situation is, indeed, unsatisfactory.

Lucky you that the bug has not impacted you, but it has caused a lot of trouble for a whole lot of people.