similar to: (Single instance) attachment storage

What would be involved in implementing SIS within Dovecot? A new or modified mailbox format? -- Daniel

I'm facing some issues on mdbox based backups. Backups are failing with dbox corruption messages. SiS is the greatest advantage though. However backups integrity is very important. If SiS/Deduplication is not a requirement stick to Maildir. Regards DP -----Original Message----- From: dovecot [mailto:dovecot-bounces at dovecot.org] On Behalf Of Gedalya Sent: 20 April 2018 08:19 To: dovecot at

Hello, I've got a Dovecot virtual email setup using maildir as the mailbox format. I am wondering from others who have chosen dbox a comparison between maildir and dbox or those who have migrated from one format to another. I am wondering if changing to dbox would be beneficial? Thanks. Dave.

I am unable top pop mail from my server, using mdbox: Nov 02 16:35:08 pop3-login: Info: Login: user=<wash at domain.co.ke>, method=PLAIN, rip=192.168.40.79, lip=192.168.40.252, mpid=36052 Nov 02 16:35:09 pop3(wash at domain.co.ke): Error: Corrupted dbox file /var/spool/virtual/domain.co.ke/wash/mdbox/storage/m.1 (around offset=1941): Ex t refs metadata corrupted: 3861 783856

Just a note to myself and whoever else cares, should be added to wiki once it has its own page about this: With single-dbox messages can be copied with hard linking. This means that there can be multiple files that point to the same attachment file. The attachment is now deleted only once the mail file's link count drops to zero, so this works fine.. ..until someone goes and starts manually

On 14 Mar 2018, 20:42 +0100, Aki Tuomi <aki.tuomi at dovecot.fi>, wrote: > > > On 14 March 2018 at 21:17 Nick Rosier < nick+dovecot at bunbun.be> wrote: > > > > > > Hi, > > > > I'm currently running a small home-server with Dovecot. A long time ago > > I configured it with SIS enabled. I would like to stop using SIS. > > > >

Hi, A couple of months ago I had a problem with Single Attachment Storage after infrastructure migration; All mailboxes were rsynced to another filesystem, and that may have broken Single Attachment Storage. Many, many (if not all) mailboxes show the below logs on dovecot: imap(foo at bar.com): Error: read(attachments-connector(zlib(/dovecotdir/mail/

I am interested in finding out your experiences with using the dbox format (especially mdbox) if you use this format. I am contemplating changing my maildir setup to mdbox but I still need to make a case for it against maildir which has become a de-facto standard and provides sort of a secure basis in case of software changes. Your input will be appreciated. -- Andreas Kasenides Senior IT

We will be deploying a replacement Dovecot server soon, and we are planning to use maildir for the primary storage, but with an archive namespace using mdbox (or perhaps sdbox), and SIS. Our backup servers and (luke)warm spare server need to obtain full copies of the mail store. For the maildirs I know I can simply use rsync (we already use it here). I'm a little wary of using rsync with

Hello Dovecoters, I am using dovecot-2.2.10-8.el7.x86_64 on RHEL 7.4 When I backup mdboxes (using SIS) using this command doveadm -Dv -o plugin/quota= sync -1f -u user1 at user.com mdbox:/mailbackup/user1 mails get backedup but all m files are not copied. Last file copied is m.4 If I run the command again I get below error I tried with doveadm backup command as well (many times).

Hello Actually we use MBOX format for all our IMAP access but users complain they cannot create subfolders in imap folders, of course they cannot because of MBOX format ... I need gurus advices on changing mailbox format Maildir of Dbox ? What would be the safest way to go ? Note : we extensively use Thunderbird here. Thanks

http://dovecot.org/releases/1.1/beta/dovecot-1.1.beta9.tar.gz http://dovecot.org/releases/1.1/beta/dovecot-1.1.beta9.tar.gz.sig Some changes since beta8: - This release should work perfectly with NFS attribute cache enabled. - Fixes to handling what should be written to cache file and when - Some index handling optimizations - IMAP LIST: dbox and cydir can now return children state Beta9 will

I recently set up SiS and imported a large chunk of mail. I've noticed one or two instances of this in the logs: Mar 28 09:03:50 mail dovecot: imap(xxx at yyy.zz): Error: Attachment file /mailstore/attachments/ce/73/ce737a45fe07495e2ae6466f9e381a30d5ec300406f11269d79bd5608cc0c922-822b3d2df67f8e4d7f5000009501e12a larger than expected (252218) Mar 28 14:52:34 mail dovecot: pop3(zzz at xxx.yy):

Hi, I use sis to deduplicate attachments, here is my `doveconf -n` ------------ auth_cache_size = 10 M auth_failure_delay = 5 secs auth_mechanisms = plain login auth_socket_path = /var/run/dovecot/auth-userdb auth_ssl_username_from_cert = yes auth_username_format = %Ln default_vsz_limit = 512 M lmtp_rcpt_check_quota = yes mail_attachment_detection_options = add-flags-on-save mail_attachment_dir =

Hello. We are using mdbox 2.013 + zlib, without SIS. When I try doveadm force-resync on a user's mailbox I get the following: doveadm(jmraya): Error: Corrupted dbox file /buzones/mydomain/0b/59/jmraya/storage/m.27 (around offset=22805024): Unexpected EOF while reading metadata header doveadm(jmraya): Warning: dbox: Copy of the broken file saved to

Based on this you are not using SIS, so I wonder if those are some old emails when you were using SIS? Can you provide an example corpus of such mail? You can use e.g. https://www.dovecot.org/tools/dbox-anonymize.pl https://www.dovecot.org/tools/maildir-obfuscate.pl https://www.dovecot.org/tools/mbox-anonymize.pl https://www.dovecot.org/tools/mdbox-obfuscate.pl to obfuscate the mail. Aki On

On Wed Apr 24 2019 04:12:30 GMT-0400 (Eastern Standard Time), Daniel Miller via dovecot <dovecot at dovecot.org> wrote: > If you've got good hardware, including a proper UPS, I'd recommend dbox > (my server is presently using sdbox). With large mailboxes and > file-based backups you'll benefit from mdbox. When reliability is the #1 > concern above anything else - use

Yesterday I had to recover an e-mail which a user had deleted. If I understand this correctly the message was expunged but not purged (doveadm purge had not been run). This e-mail was clearly still in the mdbox stored with zlib compression as I could tell using the doveadm dump command (doveadm dump -t dbox filename). I could however not reveal the e-mail with the normal doveadm fetch -u

Is SIS for dbox included in the 2.0.2 sources? Or only via Mercurial? -- Daniel

Hi, I'm currently running a small home-server with Dovecot. A long time ago I configured it with SIS enabled. I would like to stop using SIS. If I remove sis from mail_attachment_fs will the old mails that are stored in SIS-storage still be accessible? How can I convert all mailboxes to stop using SIS and store attachments back in the mails? Rgds, N.