we've always had more problems with users of Outlook than other clients, but in recent days they have become much graver. A number of users have lost mail in a way that we couldn't recover, even though we are using expunge_mode: delayed. There seems to be some correlation to this upgrade from Microsoft: <https://support.microsoft.com/en-us/kb/3114349> However, details are vague. There seem to be two types of problems: 1. Folders aren't synched with the IMAP server. There seems to be no indication of that in the UI, but has the consequence that mail for that folder is stored locally on the PC only. When the upgrade above is installed, something resets, which has the result that the local copies are purged. Since there are no copies on the server, the mails are lost. 2. Folders are moved unexpectedly when you move or rename a folder. This is mentioned in the release notes above as a supposedly fixed bug. It certainly has happened prior to the upgrade, but it's less clear if the bug is really fixed. This is especially harmful if the folders are moved to the Trash. We were able to undelete some such folders, but according to at least one user (some) mail or folders inside those folders were lost. We can find no evidence of that in our logs. Has anybody else observed issues like these? We are running 2.4.18, FWIW.
Sorry, it's 2.4.17. I have a follow-up question after talking to a user on the phone. Here's her current directory layout (partially redacted):
$ tree -d . |-- 01_ArbeitDiversity Trouble |-- 01_ArbeitFuturologie |-- 01_ArbeitGermanistentag 2016 |-- 01_ArbeitHB Literatur und Recht |-- 01_ArbeitKosmologien |-- 02_K&APY-ln1_CO_Poststrukturalismus |-- 02_K&APY-ln1_HS_Atlantis |-- 02_K&APY-ln1_HS_Pikaro |-- 02_K&APY-ln1_HS_Science Fiction 1900 |-- 02_K&APY-ln1_VL_Literatur und Medien 1600 - 1900 |-- 02_K&APY-lnHausarbeiten WS 2014_15 |-- 02_K&APY-lnKlausuren |-- 02_K&APY-lnVerwaltung |-- 02_K&APY-lnmdl Pr&APw-fungen |-- 03_Uni |-- 03_UniPromotion xxx |-- 03_UniPromotion yyy |-- 04_Stellenmarkt |-- 04_Stellenmarktxxx |-- 04_Stellenmarktyyy |-- Deleted Messages |-- Drafts |-- ESET Antispam |-- Gel&APY-schte Elemente |-- Gesendete Elemente | `-- Notes |-- Infected Items |-- Junk-E-Mail |-- Notes |-- Sent |-- Trash `-- sent-mail 32 directoriesShe claims that prior to Wednesday afternoon those folders were hierarchically ordered. There was a folder "01_Arbeit" that contained a folder named "Futurologie" and so on. I believe her, because she says she worked with a webmailer, her iPhone and Outlook 2013, and was able to see that hierarchy and all her mails on all clients. What baffles me is that all I find in our imapd.log files is this:
/var/log/imapd.log.2.gz:Dec 9 17:18:40 clotho imap[9137]: Rename: user.xxx.Gesendete Elemente.Notes -> DELETED.user.xxx.Gesendete Elemente.Notes.56685460 /var/log/imapd.log.2.gz:Dec 9 17:18:41 clotho imap[9137]: Rename: user.xxx.Gel&APY-schte Elemente.xxx -> DELETED.user.xxx.Gel&APY-schte Elemente.xxx.56685461 /var/log/imapd.log.1.gz:Dec 10 13:13:33 clotho imap[30707]: Rename: user.xxx.01_Arbeit -> user.xxx.Gel&APY-schte Elemente.01_Arbeit /var/log/imapd.log.1.gz:Dec 10 13:13:40 clotho imap[30707]: Rename: user.xxx.02_K&APY-ln -> user.xxx.Gel&APY-schte Elemente.02_K&APY-ln /var/log/imapd.log.1.gz:Dec 10 13:13:50 clotho imap[507]: Rename: user.xxx.03_Uni -> user.xxx.Gel&APY-schte Elemente.03_Uni
Our logs go back 7 days, and there are no other Renames previous to those.Is it at all possible that some operation changed the folder layout without corresponding Rename entries in imapd.log? I'm a little scared that an Outlook bug triggered another bug in Cyrus IMAP.
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