Error in downloading mail on IMAP after ios 18 upgrade

@mangalapandi

That is an interesting hint. What exactly did you do? Customization in dovecot.conf? And if so, what exactly?

I may be able to solve the problem for myself too. I found dovecot.conf in my mail configuration...

Thank you for any further information !)

I have the same problem, but it occurred way before I downloaded IOS 18:

I have Hotmail as my main email account—have for decades. Lately, the mail app on my iPhone Willy Nilly decides my password is incorrect and stops receiving and sending mail. I use the same password I have been using since I changed it earlier this year and sometimes it gets my mail working and sometimes it doesn’t. Oddly enough, the mail app on my iPad doesn’t behave this way, logging on to Outlook via a browser to access my mail doesn’t have a problem—it’s just on my phone mail app. I’m at a loss as to how to fix this. Any help would be greatly appreciated. 

I’m getting: Network Error POSIX 96 

In my case, I still had the old Hotmail account on the Mail app as my primary email. I got in a live chat with Apple help and they had me delete the Hotmail account and just install Outlook as my primary email. That fixed it; I can now receive/send email using my original hotmail address through outlook. I hope this helps someone—sorry I’m not more tech savvy.

Contact Apple Support

Contact - Official Apple Support (CA)

If you ever get them on the phone explain it to the rep, but don't let them put you off. Have it expedited and keep it going until then can either fix while you are on the phone or give you a timeline on when it is going to get fixed.

“Same Problem for me - Support said the problem is known and seems to occur if you use your own domains”

Did they suggest a workaround pending a fix? This is a serious problem.

Hi all,

I have the same problem (Network error POSIX 96). The emails do not download and refresh correctly through the native Mail app. Sometimes, they do download but I am unable to open the content of the email. I have contacted the local provider of my email and I have been informed that the issue is on Apple side. When will this be fixed? This is a serious issue. :(

There are 2 error i have notice in my dovecot setup while my iPhone Mail app given POSIX 96 error.

First time dovecot given the error "imap-postlogin: Error: ERROR 145 (HY000) at line 1: Table './last_login/lastauth' is marked as crashed and should be repaired", that is have fixed by repairing that table in mysql.

Second time dovecot given the error "imap(......@..........in): Error: mmap() failed with file /var/vmail/vmail1/..../Maildir/dovecot.index.cache: Cannot allocate memory". For this error i have increased default_vsz_limit from 256M to 512M.

Overall My Understanding is Dovecot having any error in it plugin apart from IMAP protocol, other clients are ignoring it, where us the latest Mail app throwing the error in client side. So blaming iOS18 or new Mail app is not good.

May be i can help you to fix if you share the truncated logs while accessing Mail app to your server.

I am unable to download my mail using the native mail app after upgrading to IOS 18. I am getting the following error; “Unable to create a secure connection to the server ("bad certificate format -9.808).”

The mail configuration is on imap with SSL and TLS.

Same Problem for me - Support said the problem is known and seems to occur if you use your own domains

I'm getting the message Network error POSIX 60 when trying to get my icloud mail. My phone also does not work on the wifi since the update? Any help would be greatly appreciated.

same problem with e-mail after installing IOS18.

Same here!

The same…. I can’t understand why this issue is still not resolved by apple….