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Date: Thu, 28 Apr 2022 10:27:49 -0400
From: ori@eigenstate.org
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X-Bullshit: open responsive XMPP over WEB2.0 session framework 
Subject: Re: [9front] Incoming mails disappearing
Reply-To: 9front@9front.org
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Quoth sirjofri <sirjofri+ml-9front@sirjofri.de>:
> Hello all,
> 
> For some time already I noticed that my incoming mails are sometimes 
> disappearing from my inbox. They have enough time to show up on my phone 
> (FairEmail client). First I thought it's only the mails I send to myself 
> via cron (for people asking: calendar output and a todo file), but it 
> just recently affected a mail I got from ori (who kindly sent the mail 
> again so I can read it).
> 
> Here are some conditions for mails that are affected and also some 
> details:
> 
> Only mails in my personal inbox (mbox directory) are affected. Mails that 
> are filtered and go to a different directory (ahemm, mailing lists) were 
> never removed from their directory.
> 
> I can see the mails arriving on my phone for a short amount of time (~1 
> second) and it feels like I can open them when I click the notification 
> fast enough. Sometimes however, I am just directed to my inbox directory 
> and the mail is missing.
> 
> The mails are really removed, not just hidden from imap. I wasn't able to 
> find the mails in the box directories, the queue or any tmp directory 
> that's used while processing.
> 
> I might have a weird configuration somehow. Did someone else notice any 
> similar issues? Any idea what might be wrong?
> 
> Using upas for years now and the issue wasn't bad for me personally until 
> a day ago when ori sent me that mail...
> 
> sirjofri

The only thing I can think of here is an imap bug or a pipe
bug. What happens if you put a log message and early return
here:

	/sys/src/cmd/upas/imap4d/mbox.c:464: deletemsg(Box *box, Msgset *ms)