Mail not working on iPhone after iOS 18 Update

Just tried this with no success, exact same behavior and error for simultaneous connections in the mail app. 9/23, updated this morning, no issues before. Phone restart did not make a difference after / was applied either. 🤷‍♂️ Is this siloed to the Mail app or will this happen with other mail apps as well? I've got to get this fixed for work.

Hey, here's my advice. Set up your email account on an older iPhone like 7, 8, or 10. You don't need to install those mail apps with ads. I'm using Securityfile Mail and set it up on iPhone 8. Work's like a champ. Thank you.

The strange Thing is that the headlines of my e-mails appears normaly on my Iwatch 9 (Not cellular & watch OS 11) connected to my Iphone, but the same Iphone on ioS 18.0 does not fetch the related mails.

I do have the same issue and I am very disappointed to got stuck on this for several hours before I realised that this is basically a bug in iOS. No workaround is available and working for me. Dear Apple Support, can you please fix this quickly asap.

I can't believe it, but simply turning on airplane mode and turning it off again worked for me also!! (This is after trying a reboot, which did not work.) I was missing all my work emails, work calendar and work contacts. All back now, can't thank you enough!!

An update from Apple AND COMCAST XFINITY - Both companies’ tech support reps have told me that MULTIPLE companies (including but not limited to Apple and Comcast) have seen fit to update/upgrade their email security measures all at the same time - NOW - and that has created the problems that people are seeing at this time, with server connections working one minute but not the next, etc. So it is not just Apple’s “fault” per se. Upper level tech support at Comcast told me issues at their end will hopefully be resolved by sometime this evening (at least for MY accounts lol). My recommendation is that everyone experiencing these issues contact not just Apple for assistance but also their iMAP email service providers as well.

Logged in to confirm the problem on iOS18 with an older mailserver.

Mail connects and reports that it has just updated but no messages visible.

Work around was to turn off SSL in Advanced Settings. Portnumber will automatically switch from 993 to 143.

If this disallowing a 'not so secure' SSL version is on purpose then it has the opposite effect: we'll just switch off SSL. Great idea!! (sarcasm intended)

I just purchased an iPhone 16 plus, however I cannot reply to my emails in Hotmail. It repeatedly says there is a problem. I took the iphone back to the store and they suggested using the outlook app (instead of the full web version), however this is insufficient for my work. They said Apple should be working on fixing the problem... I hope this is so, as I will have to revert back to my old Samsung 10+ until then. Note: my Samsung has been working beautifully for 9 years. I only bought a new iphone because I was having trouble sending files from my Samsung to my new MacBook. I am extremely unhappy about this situation. It is effecting my work, business and patience.

For anyone still not getting emails since the iOS18 update, if you’re on Hotmail. Delete it and re add an account. Select the Outlook.com option. It used to be under “other” option which no longer works.

Here some advises;

1) Delete your email on phone.

2) Re-Add your email account by select Outlook.

3) Or Just open your email on computer web version.

4) Other (option) no longer work.

5) You can try new email service it's Securityfile they provide Email service absolutely new in 2024!

Folks don't be zombiphobia you can using your computer wich is better and more secure.

Thank you.

Yes mail not working (apple app that comes with the phone). Unbelievable that apple lets this kind of problem out the door. Its happened with some other releases too. Email is 50% of the reason I have ridiculously overpowered phone. And they’ve done nothing yet. Wonderful.

My issue is a bit difference. My iPhone Xs with IOS 18 gets emails. When I delete an email from my iMac inbox it deletes it from the iPhone inbox. All well and good. The email goes to trash on each device. When I delete the email from the iMac trash... it DOES NOT delete from the iPhone trash.

But if I delete from the iPhone trash it DOES delete it from the iMac.

I've tried everything... but can't figure it out.

(Note: I use Postbox on my iMac and the standard IOS mail app on the iPhone. )

My issue is a bit difference. My iPhone Xs with IOS 18 gets emails. When I delete an email from my iMac inbox it deletes it from the iPhone inbox. All well and good. The email goes to trash on each device. When I delete the email from the iMac trash... it DOES NOT delete from the iPhone trash.

But if I delete from the iPhone trash it DOES delete it from the iMac.

I've tried everything... but can't figure it out.

(Note: I use Postbox on my iMac and the standard IOS mail app on the iPhone. )

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Just for fun... quit your iPhone email client and try compacting your inbox and sent and trash via your laptop/desktop email client or your host's webmail client. See if that makes any difference. It did for me... but my issue was a bit different from others here.

Can't hurt to try.

(I don't believe you can compact mail boxes in iOS.)

Since installing iOS 18 my Apple email has reported ‘incorrect password’ on both my BT email accounts. The password has not been changed and mail works fine on iPad and Mac. Other email accounts are fine. Had to delete the account and reinstall it. Clearly an app / iOS error that needs solving quickly.