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Error in downloading mail on IMAP after ios 18 upgrade

I am unable to download my mail using the native mail app after upgrading to IOS 18. I am getting the following error; “Network Error (POSIX 96)”

The mail configuration is on imap with SSL.

iPad Pro, iPadOS 18

Posted on Sep 16, 2024 10:24 PM

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Posted on Oct 15, 2024 4:36 PM

The case finally landed in Cupertino! We have a case no. and the developer are in the process of analyzing the problem and implementing a solution. It is a bug that will be fixed in one of the next releases. As soon as I have news I will post them...

72 replies

Oct 9, 2024 3:37 PM in response to mangalapandi

mangalapandi wrote:

This may not be the Mail App issue, When i got new iPhone with iOS18, i got the same issue after the migration and even i deleted the account and recreated in Mail app, it did not worked. Then i have checked my server about the dovecot error log and i noticed that its had issue in keeping the authentication session and i fixed it, then Mail app started getting message and its not showed any error related to POSIX 96 till now.

This is very significant, and probably the most useful post I have seen respecting this problem! But, how did you fix it?!?


This means, ironically, apples own (discontinued) server software also won't work with iOS 18 because it runs dovecot.

Oct 15, 2024 2:52 PM in response to mangalapandi

mangalapandi wrote:

There are 2 error i have notice in my dovecot setup while my iPhone Mail app given POSIX 96 error.
May be i can help you to fix if you share the truncated logs while accessing Mail app to your server.

I saw nothing interesting in IMAP logs on dovecot server. I see the login with no error, and no errors following.


Not set to debug, but I think it will be less effort to wait until Apple fixes iOS mail.


Thanks for the offer of help.

Nov 4, 2024 1:07 PM in response to brucefromalta loma

I’ve been having the same problem. And it’s been going on for probably two years on and off. My email works just fine on my computer and my iPad but not my phone. I have a Comcast email account and sometimes I get a massive dump of emails and then other times it just says incorrect password and I can’t get anything for days. And then all of a sudden it will work for two weeks or six months and then it will happen again. Nobody can seem to fix the problem.

Error in downloading mail on IMAP after ios 18 upgrade

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