Error in downloading mail on IMAP after ios 18 upgrade

Thank you for the very helpful advice, Plinss. It has provided some quite useful background information for resolution options for iOS 18.x users. I can understand how many users would be confused about the issue, and it may well be that in many cases the problem is not directly an Apple fault and could be attributed to various server configurations around the world. Nonetheless, the problem has clearly arisen in the main part since the ios 18 update. If it means that Apple needs to accommodate a wide range of mail configurations in its updates, then surely that needs addressing. It should not be the responsibility of individual users to resolve issues arising from product updates. Australia has quite strong legislation relating to products and services that are not fit for purpose and it may well be that this situation is approaching a tipping point where this problem will trigger some action.

“Those here running their own server, I'd like to hear what your folder separator is set to. If you change it to anything else, I expect your connection problems will go away.”

I am running a dovecot server, and I will have to figure out how to check the configuration for this information. However, I believe the separator is a dot, because I can’t create an imap folder name with a dot in it (I.e. purchases.home becomes purchases with a sub folder named home)

plinss wrote:

https://doc.dovecot.org/2.3/configuration_manual/namespace/

In my case (Debian), it's in /etc/dovecot/conf.d/10-mail.conf, look for 'namespace inbox'

Thanks again. This morning I looked at my server configuration. (I installed Postfix/Dovecot using the Cutedge Systems GUI called MailServe. So Dovecot is installed at /usr/local/cutedge/dovecot.) The only configuration file appears to be . . . dovecot/etc/dovecot.conf. But that file doesn't contain a namespace setting, so I assume that Dovecot is falling back on whatever the default is.

Refer my response to nxnw

Delete you present email account in Mail and reenter it.

I use the Outlook.com option on iOS Mail for Hotmail and Outlook emails. Others have switched to the Outlook app from the app store to get around the Mail snafu on both iOS and ipados.

Exactly the same happens here!

How do I fix it

I have an entire Airline Pilot group who uses this Apple Mail app and all are down when it comes to opening attachments.

Re-add your Hotmail account using the Exchange option.

Thank you for this suggestion but i have the mail problem in IOS18 without using any vpn or vpn app

Same problem but mine is POSIX 61. Only on phone with IOS 18, not on Ipad.