Error in downloading mail on IMAP after ios 18 upgrade

plinss wrote:

Interesting, thanks for that. It seems the we're either facing different issues, or there are other configuration settings that impact this. Do note that the excerpt you quoted above seems to be for shared mailboxes, you may have a different configuration for your inbox. Look for a namespace that contains "inbox = yes".

…

Here's what looks like the germane section of that excerpt:

namespace inbox {
  # Namespace type: private, shared or public
  #type = private

  # Hierarchy separator to use. You should use the same separator for all
  # namespaces or some clients get confused. '/' is usually a good one.
  # The default however depends on the underlying mail storage format.
  #separator = 

  # Prefix required to access this namespace. This needs to be different for
  # all namespaces. For example "Public/".
  #prefix = 

  # Physical location of the mailbox. This is in same format as
  # mail_location, which is also the default for it.
  #location =

  # There can be only one INBOX, and this setting defines which namespace
  # has it.
  inbox = yes
…
}

These are all default settings. Never touched them. Always worked, and still work on everything but iOS 18.x.

plinss wrote:

On my test server the only settings defined in the inbox namespace are "separator", and "inbox = yes" , everything else is the default value which should be equivalent to:

namespace inbox {

type = private

separator = "\\"

prefix =

location =

inbox = yes

hidden = no

list = yes

subscriptions = yes

}

This is great to know. As I mentioned earlier my settings are in . . . dovecot/etc/dovecot.conf, and they are minimal with no mention of "namespace inbox." I looked at the Dovecot configuration page you linked to earlier and learned how to use the doveconf and doveadm commands to dump my entire configuration. It is very lengthy presumably listing all the many defaults. When I search it for "namespace" nothing appears but I do have these settings in the output, both blank:

auth_master_user_separator =

master_user_separator =

If I understand correctly that probably means Dovecot is using the backslash separator (\) as a default. So maybe I'll try adding the stanza from your config with the backslash escaped (\\) and see what happens. Then try a forward slash (/) instead. Right now I'm still back on ios 17.x until I work up the nerve to upgrade and try the fix.

Apologies to all who viewed my lost post where I referred to ensuring a “backslash” was in the IMAP address field. Per my earlier posts, I intended to write “forward slash” ( / ) but the brain and fingers were not adequately synchronised. A week after the email problem was first experienced, the iPhone with iOS 18.1 and now with 18.2 is still delivering push emails as it should be, with the forward slash still in place.

Got the same issue, upgrade done (18.1.1). Issue gone. But problem still exists.. when I am in Low Power Mode -> cannot receive messages, POSIX 96 error (via IMAP).

in normal mode, everything is okey

I understand from what I have read over the past few weeks people that were having problems with POSIX 96 where running VPN's and when they shut them down things started to work again. This doesn't go for everyone.

Refer my response to nxnw

Well on the mac you can rebuild the Spotlight index if you want but it won't help the other devices. I suggest that you turn them off and then back on again.

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.