On 12/10/2021 20:54, Michael J Rubinsky wrote:
Quoting Sebastian Arcus <s.ar...@open-t.co.uk>:
Further to my thread from a few weeks ago, this has started happening
on a second iPhone at the same site. Emails on this iPhone have
stopped syncing completely 4 days ago.
This time, after the hints from Michael J Rubinsky, I've taken a
closer look at the inbox of the affected account on a computer, and
the email immediately after the last message which has synced
successfully on the phone has the following subject line:
<<PR:63364>><<IR>> Site Inspection Report, Marshalswick, St Albans
There were 7 emails with this subject line - part of a thread. After
moving them away from the inbox to another folder, the sync resumed
instantly on the iPhone.
Is it possible that some characters in the subject line above trip
Horde, or the ActiveSync protocol somewhere? If I reconfigure the
iPhone to use imap, it syncs all messages of any type, without
complaints - so the issue seems to be somewhere between ActiveSync,
Horde and the Mail app on the phone.
It could be anything to do with those emails, could be some memory limit
being hit...could be lots of things. Unfortunately debugging EAS stuff
is tough. I really can't look more into it without either a FULL
activesync log - showing all the data, or copies of the emails so I can
try to replicate the issue locally. There are tons of things that can
trip up activesync clients and we try to catch most of them (things like
email headers with the wrong charset etc..). Also, what version of PHP
are you using?
I have just sent you one of the emails suspected to cause the ActiveSync
issue.
For the log - do I turn on ActiveSync logging per device - and send you
the log for this particular iPhone - or do you want a log containing all
the devices talking to the server?
This server has PHP 7.3.10
Last time when this happened I also tried the Outlook app using
ActiveSync / Exchange on the iPhone - and that was even worse. It
refused to download any email. It kept on saying "There is no email
here" when checking the inbox.
I thought maybe the above sheds a bit more light on this issue. Please
let me know if any further details are needed. I can collect some
debug logs, or forward the troublesome email in full if that helps.
Indeed, a copy of the email as well as a full log would be very helpful.
You can forward them directly to my email address. I probably won't have
time to look at them for another week or so though...
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