[Mimedefang] action_replace_with_url

Roland Pope rpope at jadeworld.com
Mon Nov 12 19:17:18 EST 2007

-ray wrote:
> On Tue, 13 Nov 2007, Roland Pope wrote:
>> We use cyrus-imapd and 'singleinstancestore' to deal with the issue 
>> of large attachments sent to multiple users as it creates one file 
>> and hardlinks all the copies into it.
>> Overall, on our mailserver is has saved us around 20% of disk space.
>> Can be an issue though if your backup software doesn't restore 
>> hardlinks and you have to reload the whole filesystem :)
> Is that available for POP users as well?  We use Dovecot for IMAP and 
> would love a feature like that.  Alas, we are using mbox format.
> ray
The store doesn't care if the users are POP or IMAP, it does the 
hardlinking on delivery and only deletes the single copy when it has no 
more references, so yes, it does work for POP.
There are conversion scripts that will take you from MBOX format to 
Cyrus-IMAPd if you are keen to move.


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