Meaning of "older than"? [Was: Backing up mailboxes]

Patrick Boutilier boutilpj at
Tue Jun 14 11:58:50 EDT 2011

On 06/14/2011 12:51 PM, Adam Tauno Williams wrote:
> On Thu, 2011-06-09 at 10:04 -0700, Andrew Morgan wrote:
>> On Thu, 9 Jun 2011, Diego Ventrice wrote:
>>> I'm planning a backup strategy for a new server that will handle
>>> Hundreds of mailboxes. Largest server for me to admin so far
>>> Would you share your experiences backing up cyrus mailboxes ?
>>> What tool/s do you use ? how many backups a day do you run ?
>> Enabling delayed delete and delayed expunge will help a lot:
>> delete_mode: delayed
>> expunge_mode: delayed
>> You'll also want to modify your expire line in cyrus.conf to something
>> like this:
>>     delprune      cmd="/usr/local/cyrus/bin/cyr_expire -E 1 -X 7 -D 7" at=0100
>> -D and -X control how long deleted and expunged items remain on-disk:
>>      -D delete-days
>>             Remove previously deleted mailboxes older than delete-days (when
>>             using the "delayed" delete mode).
> "Older than" is a confusing statement.  According to my notes this means
> a message is kept for a minimum of X days from delivery, not X number of
> days *after* it is deleted.  I don't know why my notes say this, but I
> remember testing it and convincing myself it is true.  So -X / -D may
> not do exactly what you are assuming they do.
> Am I wrong? (and are you certain I'm wrong?)

Not sure if expire works that way but ipurge does for sure. If you have 
a message that has been sitting in your mailbox for one year and you 
delete it today than ipurge -d30 will purge the mail,

> ----
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