Dovecot dsync. I need to set date filter with argument [-e end date].
Dovecot dsync. To configure TLS on a Dovecot server, you only need to set the paths to the certificate and private . com doveadm dsync-server -u username@example. In some instances the user will experience a delayed receipt of messages if they are not connected to the server that the message is initially delivered to, sometimes the delay is 5/10 minutes, we had a recent support ticket submitted where it was over an hour. 3) dsync replication / doveadm sync not working as expected. 1 and porting it to 2. I should release beta2 or maybe rc1 soon. Now I have a working replication but with some problems and strange behavior. This behavior seems to have been introduced between version 2. 2013, at 14. conf doveadm_password = superuserpassword replication_max_conns = 10 service aggregator { fifo_listener replication-notify-fifo { group = mail user = admin mode = 0660 } unix_listener replication-notify { group Jun 16, 2015 · I've barely started reading on dsync and I wonder. Aug 23, 2025 · doveadm dsync-server -u user@emailaddress. Feb 16, 2019 · Over many months I've been getting frequent errors in synchronization using dsync. would you know if it is possible to sync/replicate only specific domain (users)? or it's always the whole lot? Jan 3, 2012 · I'm trying to use deoveadm to sync from a dovecot server running version 2. laptop1. For full details and documentation on Dovecot Pro, visit Dovecot Pro. 6 days ago · I'm trying to use deoveadm to sync from a dovecot server running version 2. 3 days ago · Hello List, I am proud to announce my project "wormhole". d/auth-passwdfile. Post by Asai service auth { unix_listener auth-userdb { group = vmail mode = 0666 user = vmail } user = root } Hello, I would like to configure a postfix / dovecot cluster based on ssh / dsync replication. 2+), postfix (2. They are hard to reproduce, and aren't always of the same nature, but there's a particular case that I can reproduce 100% of the time. g. This design can be used to build at least two different types of dsync clusters, which are both described here. net Nov 5, 2023 · In case my reading of Replication with dsync is correct, the goal of syncing the folders for one user between two mail servers should be obtainable by ensuring userdb returns noreplicate for all but one user, or only sets mail_replica for the one interesting user. ext and set both userdb and passworddb like this: Over many months I've been getting frequent errors in synchronization using dsync. 3 installs. I am trying to do this as root over ssh, with a private key for authentication. server # sudo doveadm sync -u Apr 15, 2024 · doveadm sync -u username@example. I have two linux serveurs (Oracle RHEL 5 86_64) and I install both sides dovecot (V2. For some POP3 servers it’s possible to use the more efficient pop3-uidl-migrate plugin. These enable LDAP to be used as passdb and userdb. Let's call them: server1. It doesn't require any Dovecot server processes to be running, except when using -u parameter to do a userdb lookup from auth process. I configured these servers in order to make them replicate, and I created some virtual users. 双方向のレプリケーションを使用すると、Dovecot サーバーを高可用性にすることができ、IMAP および POP3 クライアントは両方のサーバーのメールボックスにアクセスできます。Dovecot は、各メールボックスのインデックスログの変更を追跡し、競合を安全な方法で解決します。 両方の複製 Jul 2, 2014 · With dovecot 2. org/Replication What is total unclear to me 6 days ago · I'm trying to use deoveadm to sync from a dovecot server running version 2. m. If I redo the flag changes on laptop1, the process just repeats and they are removed Hi list, Replacing offlineimap with dsync for IMAP-to-IMAP synchronization (using dovecot 2. It allows to continue the use of the replication feature of Dovecot that was removed with the 2. It’s recommended that the same user always gets redirected to the same replica, but no changes get lost even if the same user modifies mails simultaneously on both replicas, some mails just might have to be redownloaded. 2 hg Oh. 5 dsync was completely overhauled and is much more reliable etc dsync uses the same configuration files as the rest of Dovecot (via doveconf(1)). > > the testsetup is already on 2. Basic concept was: - to dsync to a temp folder - using tar to preserve datetime - piping this 7z to benefit from my 16 core cpu - piping this through openssl to encrypt Over time the size of all my mail grew from 3GB to about 70GB. Mailbox list ¶ Mailboxes have 128 bit globally unique IDs, which are used for figuring out when two mailboxes should actually be synchronized. I use some java code in order to send mail (with SMTP) and Charlie Hothersall-Thomas 22 Dec 2015 22 Dec '15 12:28 p. You should be able to solve this by deleting the INBOX manually from the other side and Mar 28, 2025 · Dovecot mail server. 3. com (which in my case is mail1). Jun 16, 2015 · I've barely started reading on dsync and I wonder. History: I started this project by forking the replication code of Dovecot 2. Replication works only when I manually execute a command: "doveadm sync -A tcp:secundary I have been experimenting with dsync lately, and to my surprise I found that dsync in forward direction is extremely slow compared for reverse (-R) direction for the exact same data, disk caches flushed both times. tachtler/dovecot-backup uses it and its manpage says: dsync is Dovecot's mailbox synchronization utility. Prefetch User Database has more details on the prefetch userdb. This isn’t always trivial with some When executing a remote dsync program it works the same way: it uses its own local configuration. tld): Error: Mailbox INBOX Dec 12, 2016 · SMTPサーバ (Postfix)はそのまま同じ構成で2台構築し、DovecotのみDSyncによる同期処理を行わせる。 なお、すでに2台とも Postfix+Dovecotはインストール済み (細かい設定はまだ)とする。 Hello, i am trying to do a backup with doveadm backup command. e, /etc/dovecot 2. The first result was a patch for Dovecot 2. First of all, why dsync replication instead of block level filesystem replication? dsync won't POP3 Migration Plugin (pop3-migration) The pop3-migration plugin is used to preserve POP3 UIDLs. org> wrote: Jan 3, 2012 · I used offlineimap for years without losing flags, but I was hoping to use dovecot sync in the future, since it is a lot faster. 7) is working great, but now that I upgraded to 2. While working with the code, I When executing a remote dsync program it works the same way: it uses its own local configuration. A related issue is that if any renaming happens, the folder won't be synced incrementally because dsync doesn't realize that the folder was renamed (dsync is stateless). But in the past I have had hardware failures…so I would like use dsync to a nearly matching server for some extra safety, and I have not yet been successful. would you know if it is possible to sync/replicate only specific domain (users)? or it's always the whole lot? Jan 15, 2025 · I checked dovecot mail logs on both servers and I don't think there's anything. Doing so with -e 2020-01-01 or -e 1577829600 shows error: dovecot: doveadm: Error: dsync (mail-archive. This is an extension for Dovecot 2. ltd and server2. ext (i. dsync is Dovecot's mailbox synchronization utility. This solves two major problems: If dsync uses the same configuration files as the rest of Dovecot (via doveconf (1) binary). On the side initiating the "doveadm sync", I get the following error: 2. tld): Connected to II. I can't believe nobody on-list uses Dsync ? Ben Hello, i am trying to do a backup with doveadm backup command. It can be used for several different use cases: Two-way synchronization of mailboxes in different servers (via ssh (1)), creating backups of mails to a remote server, and convert mailboxes from/to different mailbox formats. com): handshake: Invalid sync_until_timestamp: 0 What is the correct way of time filter? Maybe I've been staring at config files and man pages too long, but the doc page for Dsync is a little confusing and I don't how to solve my problem. 4 I believe? Hello, i am trying to do a backup with doveadm backup command. dsync is a Dovecot feature which the "replication" plugin uses to support the setup that we want. 2 or later. 0 tree is a new utility for syncing a mailbox in two locations. Flag changes on laptop1 propagate to server, but then are reverted on server when laptop2 syncs with server, and then are reverted on laptop1 when it syncs again with server. 19: /etc/dovecot/dovecot. Setup file-based users database Edit /etc/dovecot/conf. I understand we could use dovecot sync but I am not sure what the implications may be from a cPanel perspective (i Mar 8, 2019 · dovecotのDsyncを使ってメールサーバの冗長構成を実現させたいと考えています。 冗長構成は、Dovecotの2台で片側をMasterとして普段使用し、もう片側へDsyncを使って常時レプリケートさせます。 Chapter 1. Sep 24, 2016 · dsync is Dovecot's mailbox synchronization utility. I would like to sync both server using dsync. I do not managed to get the whole replicator thing working, so as part of Dovecot CE DocumentationOther Issues: Folder renames if the names are invalid or too long. The entire configuration can be changed by giving -c parameter to another configuration file, or using -o parameter to override specific settings. Before dsync actually starts syncing anything, it first fetched a list of all to-be-synced messages and adds them to a GUID -> message hash table. The clarity in the process and detailed instructions are valuable resources for those working on similar configurations. 2 design is somewhat different. would you know if it is possible to sync/replicate only specific domain (users)? or it's always the whole lot? I've barely started reading on dsync and I wonder. 0. . Guess I don't quite get namespaces, but we have the following namespace configured: $ doveconf namespace namespace { hidden = no inbox = yes list = yes location = prefix = INBOX. It is possible to do master/master replication using dsync. For example, TLS is enabled by default to transmit credentials and data encrypted over networks. 5 dsync was completely overhauled and is much more reliable etc Mar 12, 2019 · In another thread, Timo wrote: On Mar 12, 2019, Timo Sirainen via dovecot <dovecot@dovecot. die. I do not managed to get the whole replicator thing working, so as part of Dovecot removing replication, possible solutions? Hi all, Been noticing some chatter on the dovecot-users mailing list regarding Dovecot removing the Replication feature in a coming version of dovecot, 2. See full list on linux. On the side initiating the "doveadm sync", I get the following error: Jun 16, 2015 · ok, I see, thank you before now I delve into trying - having used wiki howto/example literally to setup replication I see that dsync attempts to replicate every user above my first_valid_uid, which already is a problem since this uid is my vmail=492 (I use if for non system users) and there are other system users up to uid=1000 (where "regular" users (ldap backend) start, a common scenario I Hi all, I am still struggling with this issue. 9. dsync can sync either one or multiple users using the -u or -A parameters. 21. 4). 13) and imap. x you can sync your mails over tcp (or ssh) between two servers. Hello everyone, recently I have been working with Dsync & dovecot replication in order to make my privately hosted email servers more reduncant; I need constant access to my emails, but I love managing email servers and my own infrastructure so cloud hosted email isn’t on my list of choices. But it's still beta1. May 15, 2025 · Is it possible to setup automatic mail sync between two Hestia servers? I have 2 Debian 12 Hestia 1. Dovecot CE DocumentationCopy Optimizations Before dsync actually starts syncing anything, it first fetched a list of all to-be-synced messages and adds them to a GUID -> message hash table. 32. Jan 23, 2025 · I have a very basic postfix/dovecot server, with just a few users, and it works. Apr 8, 2016 · 1 dsync is 'idempotent' and will synchronise from whatever state you are currently in; there is no queue of pending changes as there is with something like MySQL replication. 10 would always ask for my SSH key/passphrase, ignoring ssh-agent. See below for the full debug output from both versions followed by the dovecot On Sun, 2013-02-17 at 12:30 +0200, Timo Sirainen wrote: Previous message: dsync dovecot / Failed connection refused Next message: dsync dovecot / Failed connection refused Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the dovecot mailing list Jan 3, 2012 · dsync (local@domain. Basically the problem is that the local and remote INBOX has a different mailbox GUID, so dsync treats them as different mailboxes that have a naming conflict. ltd. A related issue is that if any renaming happens, the folder won’t be synced incrementally because dsync doesn’t realize that the folder was renamed (dsync is stateless). If it does, it starts a message copy operation instead of a full Feb 28, 2012 · This document describes a design for a dsync-replicated Dovecot cluster. This means that, when server B comes back up, the next time a dsync is triggered, you will end up with both servers back in sync. I'm trying to use deoveadm to sync from a dovecot server running version 2. com): handshake: Invalid sync_until_timestamp: 0 What is the correct way of time filter? Jan 23, 2025 · I have a very basic postfix/dovecot server, with just a few users, and it works. tld): Info: imapc (remote. com): handshake: Invalid sync_until_timestamp: 0 What is the correct way of time filter? I've barely started reading on dsync and I wonder. Feb 1, 2019 · Hello! Did someone encounter the following issue? I cannot resync mails between two servers (Dovecot v2. Comment-out the Other Issues: Folder renames if the names are invalid or too long. I do not managed to get the whole replicator thing working, so as part of Aug 19, 2013 · 2. pop3-migration plugin ¶ The pop3-migration plugin is used to preserve POP3 UIDLs. 4. Mar 18, 2025 · WARNING Dovecot 2. I installed dovecot on the target host and config'd it as per the second doveconf below Jun 20, 2017 · I'm using dovecot with master/master replication using dsync, and I did the setup as described on https://wiki. - The doveadm_port is opened in the firewall of both servers (but only for traffic from each other - don't open this port publicly). The plugin works by matching POP3 messages to IMAP messages. I scraped my previous configuration and started from beginning. 06, Oli Schacher <dovecot at lists. 9 I'd like to take advantage of the incremental replication [1]. Jan 23, 2017 · Dear all, I am using VMWare and I have cloned my emails server. Some things it can be used for: - Initially transfer a mailbox to another server via SSH - A faster sync done to an existing mailbox, sending only changes - A superfast sync based on modification sequences. If the folder name is too long, a new generated GUID is given it as the name. dsync (short for doveadm sync) is Dovecot's mailbox synchronization feature. 10. ltd Enable the replication plugin globally mail Mar 12, 2019 · In another thread, Timo wrote: On Mar 12, 2019, Timo Sirainen via dovecot <dovecot@dovecot. dsync uses the same configuration files as the rest of Dovecot (via doveconf (1) binary). I'm reposting below a message that gives the method for Syncing INBOX is a bit weak point with dsync currently. Configuring and maintaining a Dovecot IMAP and POP3 server | Deploying mail servers | Red Hat Enterprise Linux | 10 | Red Hat DocumentationDovecot provides a secure default configuration. - Source and destination mailboxes can use different dsync is Dovecot's mailbox synchronization utility. net mirror mdbox:/tmp/janfrodeboks dsync (atmail): Error: user janfrode at tanso dsync v2. It involves read status being synced in the wrong direction when two machines are both synchronizing with a server. The comments highlight the appreciation for the insights shared and the article's value Dsync Design ¶ FIXME: This describes the design for v2. See common LDAP configuration and auth LDAP configuration for the setting parameters available in the ldap conf. Dovecot is working well except concerning the sync. separator = subscriptions = yes type = private } But when I try running dsync it complains: $ sudo -u atmail dsync -u janfrode at tanso. On 31. would you know if it is possible to sync/replicate only specific domain (users)? or it's always the whole lot? May 31, 2014 · I’ve previously written about dsync as a tool provided by dovecot to migrate mailbox formats but it’s also a tool that works over SSH and TCP for synchronizing mailboxes across two instances of dovecot. Mar 6, 2021 · - Both servers have a valid SSL certificate for the hostname. We want to sync mail between the 2 servers. If it does, it starts a message copy operation instead of a full save Feb 28, 2012 · Bufete de Abogados Accidentes de Camiones The article on Dovecot clustering with dsync-based replication is a technical gem that provides an in-depth understanding of the complex setup. The culprit is the env_clean () in the stack below. I used as follow on both machines: # service dovecot stop # rm -Rd /home/user/Maildir/index # service dovecot start # sudo doveadm sync -u user tcp:imap11. Contribute to dovecot/core development by creating an account on GitHub. `doveconf -n' output: We have a secondary server WHM server. When dsync is handling IMAP INBOX and requests a POP3 UIDL, the plugin connects to the POP3 server and figures out which IMAP messages match the POP3 messages and returns the appropriate POP3 UIDL. domain. Dovecot CE is designed for use on a single server. 0/v2. dsync config server1. There's a small issue if you followed the Linode guide, where we cannot list the users. 2 (latest hg version). 1 to a version running 2. It can be used for several different use cases: Two-way synchronization of mailboxes, creating backups of mails, and convert mailboxes from/to different mailbox formats. III. The “unset” value is returned as 0, so it’s not possible to differentiate between “unset” and “set” 0 values. 1. Debian Jessie’s version is ok. 77). II:PPP (local II. Several times per day I also have the problem that sync stops working and I have to remove the state file for new messages to be noticed. I'm reposting below a message that gives the method for Dovecot Pro uses Dovecot Core as part of the Palomar architecture. When using dsync to convert a mailbox, the conversion loses a mailbox GUID and produces a warning. imap. 12 Distrib 5. 2. dsync can be run completely standalone. would you know if it is possible to sync/replicate only specific domain (users)? or it's always the whole lot? many thanks P. dsync in Dovecot v2. would you know if it is possible to sync/replicate only specific domain (users)? or it's always the whole lot? Sep 4, 2024 · Replication with dsync に，基本的に全て書かれている．二つの dovecot サーバ間で master/master 同期を行う，という機能．メールボックスに何か変化があった場合，replicator というプロセスが走り，もう一つのサーバに同期をかける． [2021-05-27] 現在，なんらかの原因 To use dovecot clustering feature, known as dsync, we need dovecot 2. tld): Warning: Failed to copy source UID=24 mail: Mail size is larger than the maximum size allowed by server configuration - falling back to regular saving dsync (local@domain. Tried to setup Dovecot sync with official guides. On the side initiating the "doveadm sync", I get the following error: Hi, I had an old dovecot server with a working backup script. It has a rewritte dsync that >> works better. Apr 26, 2015 · Setup dsync Now that you have two mostly identical mail servers with replicated MySQL, we can add dsync to synchronize the e-mails. com): handshake: Invalid sync_until_timestamp: 0 What is the correct way of time filter? Jan 3, 2012 · hi everybody I've barely started reading on dsync and I wonder. conf First and foremost, you need to update both to 2. dovecot. Whenever dsync needs to sync a new message to the other side, it first checks if the message's GUID already exists on the other side. - The doveadm_password (set in the earlier mentioned config file) is the same on both servers. ch> wrote: >> b) Switch to v2. Ville has also drawn overview pictures of these two setups, see director/NFS-based cluster and SSH-based cluster. 31 and 2. The v2. adding 20-dsync. Dovecot Community Edition Dovecot Community Edition (CE) is the open source version of Dovecot. These came in pretty late in the thread and I did not get a full picture of what kind of setups and parameters were used. x settings will NOT work unless the configuration is changed as described in this section. I've probably missed something simple and stupid, but as I said, I've been staring at this problem too long and need a second pair of eyes on it ! I installed dovecot on the target host and config'd it as per the second doveconf below Mar 12, 2019 · Re: flags not synced correctly with dovecot sync (dsync) Dan Christensen 13 Mar 2019 1:23 a. dsync (short for doveadm sync) is Dovecot's mailbox synchronization feature. com It's not perfectly clear but I guess here mailuser@example. com: (from my understanding) ssh runs this part of the command on the new remote dovecot server to get this whole thing working. I need to set date filter with argument [-e end date]. 5 dsync was completely overhauled and is much more reliable etc dsync? Stumbled across it, didn't try. in place, using the Dovecot transaction logs and some pretty complicated application login, but a lot of data still needs to be processed by the dsync "brains". The usual way to resolve this by renaming doesn't work, because INBOX can't be renamed. org> wrote: Hi, Sorry to bump it, but I've yet to receive even one reply to my question the other day about Dsync ? Everyone else seems to have been receiving replies to their questions and so I'm feeling a little lonely out in the cold. Just install the latest dovecot-version. The userdb prefetch allows IMAP or POP3 logins to do only a single LDAP lookup by returning the userdb information already in the passdb lookup. com is for an account mailuser that ssh can use to log into example. com ssh -i id_dsa. Thanks to Aki Tuomi and his suggestion I changed the users in my configurations from vmail --> root and that helped. Now I do have two identicals servers, both running the same version of dovecot (2. would you know if it is possible to sync/replicate only specific domain (users)? or it's always the whole lot? Dovecot contains mail_index_uint32_to_offset() and mail_index_offset_to_uint32() functions to translate values between integers and lockless integers. dovecot mailuser@example. wgwh. Wondering if that extra dsync-server after the user is somehow being added to the command? ok, I see, thank you before now I delve into trying - having used wiki howto/example literally to setup replication I see that dsync attempts to replicate every user above my first_valid_uid, which already is a problem since this uid is my vmail=492 (I use if for non system users) and there are other system users up to uid=1000 (where "regular" users (ldap backend) start, a common scenario I Feb 16, 2019 · I should add that these problems arise frequently in practice, even if changes are only being made on a single machine, e. There are several fixes done to dsync since beta1, including a fix for these maildir errors. dsync attempts to fix invalid folder names automatically. II:PPPPP) dsync (local@domain. host. On the side initiating the "doveadm sync", I get the following error: Jan 3, 2012 · Hello, i am trying to do a backup with doveadm backup command. On the side initiating the "doveadm sync", I get the following error: I've run into an issue with in-place mailbox format conversions between mdbox and maildir and wondered if someone could assist. conf. 4 release. Two-way synchronization ¶ dsync attempts to preserve all changes done by both sides of the synced mailboxes. 0) and mysql (Ver 14. kkcsgkel vqtn 74 muz2wn xadt 7hl8q yxtlm yp gzc 6yn1v
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