iPhone won't connect to Comcast email after iOS 18 Update

Found this on the internet - it worked. It has nothing to do with VPN. you have to log in to xfinity email via web, then click gear/settings in upper right and under email settings click on Security, then check the box 'Third Party Access Security'. Go back to your iphone mail app and add account - connected right away - no issues!!!

Found this on the internet - it worked. It has nothing to do with VPN. you have to log in to xfinity email via web, then click gear/settings in upper right and under email settings click on Security, then check the box 'Third Party Access Security'. Go back to your iphone mail app and add account - connected right away - no issues!!!

I had the exact same issue so I called Apple and they told me to delete the Mail app and then add it again and after that it worked fine except for one issue. When I open Mail it sometimes takes a really long time to download the messages. Sometimes as long as 20 minutes, other times it’s as fast as usual.

I called the 2nd level service phone 888-565-4389 and found very helpful folks. Kind of amazing, but most welcome. The upshot is that after removing and replacing this account several times, hearing that my "IP was blacklisted" and other reasons, I finally found a tech that admitted the problems all began on some phones and ipads when they installed ios 18. This happened on my ipad and iphone. Not on my wife's ipad. She is fine.

Probably something in the Mail program and not on all phones.

Would like Apple to resolve this. Hope 18.1 does this for those affected.

In the meantime I have my email that comes to comcast.net forwarded to my gmail address! Not a bad workaround.

Definitely the Mail app - as a workaround I installed the GMail app from the App Store - Comcast works fine on iOS 18 with the Gmail app

XFinity added this page for the iOS 18 Mail issue: Setting up Xfinity email in iOS 18

Turn off any VPN you are using

Comcast requires you to change your password every year. But they do not notify you. So login to your email via the internet and you will be prompted to reset your password.

I am now connected to Comcast email on ios18.0.1. Must have been fixed by one party or the other (Xfinity or Apple) with no notice. It just works now.

I have had this mystery with Comcast before. It pays to call 2nd level service and pass on the problem. Somehow it makes its way to tech support and eventually gets fixed. Those first few days when email won't connect won't make me change my email password ever again! Just report and wait.

I was always able to read my email on the Xfinity web site but just don't expect this hassle. Need to remember to just wait!

I am also having the same issue, I am unable to to receive my Comcast emails. I have tried removing and adding back and I get the message …currently unavailable but I can go to the web and my email is working fine. This issue only started after updating to the iOS18 version.

After installing IOS 18.0.1 My Comcast email no longer works. Repeatedly ask for password even though password is already in the mail app setting. Says that IP address has been temporarily blocked as it is Blacklisted.

My email was fine until I applied this update. Please advise on how Apple is going to provide work around

Thank you! I forgot I got the Blacklisted IP notification also while visiting my grandkids in TN. I’ll mention that to Xfinity tech support when the third level calls me back in a “few days” 🤦🏻‍♀️

Same issue, although mine didn't start until the 18.1 update. Get log in error and details say IP temporarily blacklisted. I can log in via xfinity web, but even the xFinity app e-mail option doesn't work, so not entirely sure it's an Apple issue. Seems more like an xFinity issue with compatibility with Apple's latest ios 18x updated.

I am having the same problem. I've contacted Comcast (Xfinity), Apple, and Microsoft about not being able to add my Comcast email to either Outlook or the iPhone mail app. I finally got it to add on my Mac Mini, but not from any tech help. I would appreciate getting some sound advice here on how to get mail back on my iPhone 15ProMax!