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On Wed, 3 Feb 2010, Răzvan Sandu wrote:
- IMAP is allowed only locally, in order to be used together via stock
squirrelmail Web interface (for emergencies only)
However, there are users that check the infamous „Leave a copy on the server”
checkbox (or equivalent) in their mail clients, eventually adding „Delete
messages after X days”.
Since I have no direct administrative control on the clients, I
absolutely need a way to forbid the above behaviour at server level, in order
to enforce the policy. The server's HDD is meant to store received messages
from reception to the first access only.
Filesystem quotas are not an option in this scenario, since the UID/GID is
the same for all virtual users.
What I need is way to make sure that "cur" and "tmp" subdirectories are
perfectly empty after the user downloads his mail.
"tmp" is temp, hence, I do:
find /path -maxdepth 4 -name tmp -type d -print0 | \
xargs -r0 /usr/local/sbin/emptyDir
==== emptyDir
find "$@" -type f -mtime +2 -delete
====
once a day anyway.
(I will also need a way to make sure that users using squirrelmail leave no
populated "Sent" and "Trash" folders on server's HDD, but that's offtopic
here).
Well, find /path -maxdepth 3 \( -name .Sent -o -name .Trash \) -print0 | \
xargs -r0 /usr/local/sbin/emptyDir
Maybe:
# delete any Maildir mailboxes except INBOX
for user in /path/*/Maildir; do
# Maildir mailboxes start with a dot
find "$user"/.[^.]* -type f -mtime +2 -delete
rmdir -p "$user"/.[^.]*/* > /dev/null 2>&1
done
Could you please suggest a way to solve this ?
The problem IMHO is: that you allow IMAP access for emergency, but then
want to delete cur/.
How about these:
1) Once a day you traverse the logs and check when an user has logged in
with POP and IMAP, if login(POP) > login(IMAP), empty cur/ .
2) You do postlogin scripting:
http://wiki.dovecot.org/PostLoginScripting
for IMAP only. The script sets a flag to _not_ purge cur/ of the
particular user once a day.
I would use "-mtime +1" to give each user one day to re-download the mail
in case, well, of a problem.
Regards,
- --
Steffen Kaiser
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