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
@ferrerod:
Here's the main part of the response I got from Fastmail who diagnosed and solved the problem on my account. It seems there was a bug in their mail engine that was benign until the iOS18 update, then no more. I hope this helps.
We had a bug which put random data into the HIGHESTMODSEQ value for some users. Their account was affected by this. We didn't think it was an issue because there was still heaps of number-space left, but the HIGHESTMODSEQ values were higher than a signed int64 can hold. This was fine because we use an unsigned int64_t internally, but the spec was updated a few years ago to make it a signed value, so we were strictly wrong.
Apple's parser couldn't handle these oversize numbers, and failed.
--
This has now been fixed by resetting the HIGHESTMODSEQ value for these users which also means this will never happen for them again.
ferrerod wrote:
Did fastmail tell you what technically they did? No one else has a workable solution. Some of us support our own mail serves - though perhaps rare.... would be great if you could get them to tell you exactly what they did for IMAP solution.
plinss wrote:
Please don't change it to "\\", that configuration I posted is an example of what doesn't work (for me at least).
Understood. I thought it might be a good experiment since my configuration currently seems to use a default separator, possibly a dot. Did trying a forward slash irreversibly scramble your folder nesting or the did the hierarchy recover when you reverted to your previous configuration?
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.
I Just downloaded the update - 18.1.1 - and it’s still the same - not fixed! Extremely annoying, since my iPad is my main email etc when I’m not at work. I can at least access them on my android phone but that is not workable long term! I’m on Yahoo mail, which is what a lot of people used on another site chat stream - from September! Ridiculous it’s taking them this long!
@nxnw I am seeing almost identical logs on my mail server too. Same behaviour is apparent in terms of the connection on the mail server being closed long before the mail app stops saying “checking for mail”
Yes me too and now it’s the same problem with my IPad too since the update IpadOs 18.1.1, network error POSIX 96. Nothing works, the IPhone and now the IPad. Terrible! I don’t understand why Apple doesn’t fix this bug , so many people have the same problem!
The issue, Obi1net, is that I am not allowed to edit the slash (which is greyed out), and I don't want to jailbreak my devices ... The general problem I understood, I just don't know how to fix it in a legally correct way. Any idea?
Yeah, and Apple "support" in Germany is totally unsupportive! The 1st level support lady was completely overwhelmed by my question concerning this issue, 2nd level support then claimed I were the only one who has reported it so far ... Come on, really? There's plenty of evidence here, as well as in other tech forums, that people have been annoyed for weeks now.
They asked me to configure my mail account anew, which I won't do, of course, now that I know from you guys in this forum that it won't resolve the problem anyway. Should anyone from Apple "support" read this post, here comes the track number: 102475869211.
Yes, the same for me with my Internet services provider, they told me that it’s an Apple problem, and there is more and more people who have this problem, I don’t understand why it’s not fixed yet. Shall we have to let down the Apple app Mail for another one?
Hey Apple, instead of removing my comments, outlining your failures to fix the problem. Why don’t you just fix the problem?
You have the engineers that know how to fix this. It’s going on eight weeks.
Apple has continued to remove my comments within 30 seconds of posting my dissatisfaction with the failed solutions. You have the engineering power to fix this quickly. Why are you holding your users hostage?
I have five domains using IMAP, they’re all set up identical however one out of the five refuses to connect and I’m forced to use web mail for correspondence.
Let’s see how fast they take this one down
So much for having a transparent community of support users. Apple keeps taking my comments down in reference to this problem, not being fixed eight weeks in.
I have five different accounts set up identical, but one for whatever reason Reason refuses to connect
I’m forced to use webmail on my native Apple product using Apple’s email program
Why not leave my comments up instead of removing them that seems less transparent.
i am an apple guy since 1984 but this is just ridiculous
Apple1138 wrote:
So much for having a transparent community of support users. Apple keeps taking my comments down in reference to this problem, not being fixed eight weeks in.
Some of your comments have likely been removed automatically because you made innocuous mention of a letter in a Mediterranean alphabet that must not be spoken. The automation has no intelligence or ability to assess context, unfortunately.
[Edited by Moderator]
I'm a registered Apple Developer and I can see the detailed (developer level) release notes of iOS 18.2. There is a minor Mail fix mentioned in iOS 18.2 but no IMAP fix mentioned....hopefully there will be a fast-fallow like 18.2.1 with the much needed fix.
I agree, definitely seems related to UI to me.
Email will eventually arrive if the device is left alone and the fetch schedule is allowed to run normally in the background.
attempt to manually check for Mail when there is nothing new on the server to be downloaded, also seems to run normally.
attempt to manually check for Mail when there IS something new to be downloaded -> triggers the issues
… interested to know if this is what others are seeing.
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.
Error in downloading mail on IMAP after ios 18 upgrade
