Apple Errors Linux Networking Software

Courier IMAP and auto deleting trash after 7 days

E-mails that had been deleted for over 7 days were automatically removed from the IMAP server. E-mail date was ignored (ie the mail could have been from 2010; the actual time in “Trash” counted). This didn’t happen to other folders (Sent, Archive, Spam). This recently happened and hadn’t happened before.

I had to restore my trash folder from backups every 7 days (yay for rdiff-backup).

It took me a while to figure it out… The problem first appeared in October, right after several big changes:

  • Yosemite update
  • Airmail to Airmail 2 update (I was convinced this was the root cause, looking at my clients instead of the server)
  • Android 5.0.x
  • Android Email app sunset, changes to GMail app
  • IPv6 working decently at home after updating my RPi to Fritzbox devices.
  • Random connection errors in GMail app (this was due to misconfigured DNS in the GMail app and causing IPv6 catch all to redirect to the webserver instead of the mailserver. It didn’t happen consistently because over mobile (4G & lower) there is no IPv6 and at home is randomly falls back to IPv4 as well. IPv4 DNS was well configured.
  • Moving my ~100.000 deleted e-mails from “Deleted Items” (OS X Mail default) to “Trash” (Android & Courier default) to stop having to move them manually from one folder to the other every so often. => this was eventually the cause but I didn’t realize.

Being convinced it was most likely Airmail 2 and very maybe Android I had been looking in that direction.

Debugging was also extremely slow as I had to wait 7 days before being able to check if the changes I made helped anything.

I eventually figured out that it was not Airmail when I rebuild my whole mail database and it defaulted back to putting my deleted mails into the Archive folder instead of Trash. Archive mails were kept over 7 days, but items in Trash still removed.

That’s when I started looking at Courier IMAP config: /etc/courier/imapd (and not imapd-ssl).

There’s an option that says:

# The following setting is optional, and causes messages from the given
# folder to be automatically deleted after the given number of days.
# IMAP_EMPTYTRASH is a comma-separated list of folder:days.  The default
# setting, below, purges 7 day old messages from the Trash folder.
# Another useful setting would be:
# IMAP_EMPTYTRASH=Trash:7,Sent:30
# This would also delete messages from the Sent folder (presumably copies
# of sent mail) after 30 days.  This is a global setting that is applied to
# every mail account, and is probably useful in a controlled, corporate
# environment.
# Important: the purging is controlled by CTIME, not MTIME (the file time
# as shown by ls).  It is perfectly ordinary to see stuff in Trash that's
# a year old.  That's the file modification time, MTIME, that's displayed.
# This is generally when the message was originally delivered to this
# mailbox.  Purging is controlled by a different timestamp, CTIME, which is
# changed when the file is moved to the Trash folder (and at other times too).
# You might want to disable this setting in certain situations - it results
# in a stat() of every file in each folder, at login and logout.

Comment out that last line, and restart courier-imap(-ssl)… Simple as that.

This solved my issue.

I’m not sure when that config change happened (Debian update?) and I do not know who at Courier thought it was a good idea …. But sheesh.


o iPhone

You’re not what you once were.




Beats by Dre

Apple Hardware Linux Software

Auto turn on a Linux Mac Mini after a power outage

Mainly a note for myself, in case I need it again in the future.

And the original blog post is here.

This will turn on a Mac Mini (at least PowerPC arch, not sure about Intel), running Linux, the moment it has power again.

echo 'server_mode=1' > /proc/pmu/options

Edit & Note: This option seems to be reset after every boot to. So add it to rc.local or something.

Apple Hardware Linux

Yard Sale: Mac Mini (G4)

I’m selling a Mac Mini 1.5Ghz G4 (PowerPC) with 512Mb ram. It has a 80Gb disk in it (7200 rpm I believe, but not sure). It runs Linux like a charm, and is a perfect server (and WAY faster than a Raspberry Pi).

IMG_20140418_104714 IMG_20140418_104725

I believe the latest version to run was Mac OS X Tiger (10.4).

It comes with the power adapter, a DVI to VGA adapter, and in the picture below is the optional WiFi adapter.


Tyr ~ # uname -a
Linux Tyr 3.2.0-4-powerpc #1 Debian 3.2.54-2 ppc GNU/Linux

Tyr ~ # free -m
total used free shared buffers cached
Mem: 500 217 283 0 11 171
-/+ buffers/cache: 34 466
Swap: 953 0 953

Tyr ~ # df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 73G 882M 72G 2% /
udev 10M 0 10M 0% /dev
tmpfs 51M 212K 50M 1% /run
/dev/disk/by-uuid/bf89e3dc-6606-45e1-a87f-ab8e1be66b85 73G 882M 72G 2% /
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 291M 0 291M 0% /run/shm
tmpfs 251M 40M 211M 16% /var/cache/apt
tmpfs 251M 73M 179M 29% /var/lib/apt/lists
tmpfs 291M 0 291M 0% /tmp

Tyr ~ # cat /proc/cpuinfo
processor : 0
cpu : 7447A, altivec supported
clock : 1416.666661MHz
revision : 1.2 (pvr 8003 0102)
bogomips : 83.24
timebase : 41620907
platform : PowerMac
model : PowerMac10,1
machine : PowerMac10,1
motherboard : PowerMac10,1 MacRISC3 Power Macintosh
detected as : 287 (Mac mini)
pmac flags : 00000010
L2 cache : 512K unified
pmac-generation : NewWorld
Memory : 512 MB

Price: €50

Contact: [email protected]