davmail 5.5.1 keeps moving messages from Inbox to Trash

[alanorth]

I'm using davmail 5.5.1 on Arch Linux and I am not sure how to explain it, but sometimes I find messages from the Inbox in my Trash. I drag them back to the Inbox in Thunderbird, but when I check the Trash a few minutes later they are back in the Trash.

My configuration is using Outlook 365 in O365Modern mode with IMAP/SMTP on Thunderbird 78.10.1. Thanks!

[mguessan]

DavMail will not move messages on its own, except in POP mode.

You should probably check Thunderbird spam settings and DavMail log to understand what is going on.

[alanorth]

Thanks @mguessan. I just checked again after using Thunderbird for an hour or so, reading some emails, responding to some, and deleting a few others. I was surprised to find a handful of messages in my Trash again.

I am willing to try looking in the logs, but I'm anticipating there being thousands of lines, and I'm not even sure how to trigger this weird behavior. Which logging parameters should I set? I currently have:

• log4j.logger.httpclient.wire=WARN
• log4j.logger.org.apache.commons.httpclient=WARN
• log4j.rootLogger=INFO
• log4j.logger.davmail=INFO
• log4j.logger.org.apache.http.wire=WARN
• log4j.logger.org.apache.http=WARN

[mguessan]

You need:

log4j.logger.davmail=DEBUG

to get all IMAP commands passed on your IMAP connection

Then look for MOVE message commands.

[alanorth]

You're right, this does seem to be a Thunderbird issue. I just noticed this message in the status bar a few seconds after dragging one of the emails from the Trash to the Inbox:

Moved 1 message from Inbox to Trash

So Thunderbird is doing something weird here. I've been using Thunderbird for years so I'm not sure what it could be. Perhaps it's a setting in this new profile I created when migrating to davmail a few weeks ago. These messages are not spam and there are no filter rules for this account! Curious and infuriating.

Closing this issue as it's unrelated to davmail.

[alanorth]

@mguessan I am still getting this bug. It only happens on my davmail IMAP account. Never on my normal IMAP account with a non-Microsoft mail provider.

In the screenshot below you see Thunderbird moves two images from Inbox to Trash (without me asking!). Then I go to the trash and move them back to the Inbox. Then it moves them back after a few seconds. And on and on...

I see something like this in the log with log4j.logger.davmail=DEBUG:

2021-11-03 15:51:34,096 DEBUG [ImapConnection-58528] davmail  - < 105 uid move 50733:50734 "Trash"
2021-11-03 15:51:34,660 DEBUG [ImapConnection-58528] davmail  - > 105 OK move completed
2021-11-03 15:52:02,637 DEBUG [ImapConnection-58532] davmail  - < 58 uid move 12871:12872 "INBOX"
2021-11-03 15:52:03,235 DEBUG [ImapConnection-58532] davmail  - > 58 OK move completed
2021-11-03 15:52:13,598 DEBUG [ImapConnection-58528] davmail  - < 110 uid move 50735:50736 "Trash"
2021-11-03 15:52:14,151 DEBUG [ImapConnection-58528] davmail  - > 110 OK move completed
2021-11-03 15:51:20,241 DEBUG [ImapConnection-58532] davmail  - < 51 uid move 12869:12870 "INBOX"
2021-11-03 15:51:20,820 DEBUG [ImapConnection-58532] davmail  - > 51 OK move completed
2021-11-03 15:44:45,224 DEBUG [ImapConnection-58528] davmail  - < 98 uid move 50731:50732 "Trash"
2021-11-03 15:44:45,820 DEBUG [ImapConnection-58528] davmail  - > 98 OK move completed

A few other observations:

• It only seems to happen to messages I've replied to
• If I move them back to the Inbox and then quit Thunderbird, it doesn't happen to those messages again after re-opening Thunderbird

Appreciate any more help troubleshooting. Thank you!