Dovecot storage backend.

Dovecot storage backend However, all the examples I have found are using local mailboxes for storage. But none even attempt to make use of database like MySQL as actual storage backend. Bulk imapc settings have moved away from plugin {} section and mail_location. The mail indexes are updated locally while the user does mailbox Backend Crashes¶ Dovecot doesn’t use metacache for users that were accessed before the backend crashed the last time. Set to 1 to not add X-Dovecot-User or X-Dovecot-Session headers to HTTP request Useful to correlate object storage requests to AS/Dovecot sessions. One possibility would be to write a script that reads quota limits from another file, merges them with passwd file and produces another passwd-file, which you could then use with Dovecot’s Passwd-file. 0. conf plugin section at all, because it always gets overridden This is because normally Dovecot doesn't do any unnecessary Cassandra work, so it doesn't notice when these problems happen. However, if you wish to use an existing external Redis cluster, set CELERY_BROKER_URL and CELERY_RESULT_BACKEND with the connection details of your Dec 21, 2024 · Dovecot Pro Full Text Search (fts-dovecot) Plugin Dovecot Pro Full Text Search (FTS) is a proprietary, Pro-only FTS plugin. example. All supported Cluster Controller Installation options provide a built-in Redis cluster deployment. With the Dovecot Object Storage backend this behavior is fine. Preserve entire environment for doveadm, not just import_environment. Apr 22, 2025 · Controller needs a working Redis cluster for both task scheduling and runtime cache storage. x's director_tag functionality, you can create an entry yourself with the appropriate backend. conf so a cluster restart will know about it. I now have 1000/400 Fibre for my primary transit at home and 5G Mobile backup so can get data to and from the cloud pretty quick. This setting handles the basic Object Storage configuration. If not doing correlations via log aggregation, this is safe to disable. Both operations are transparent to the user. Apr 14, 2025 · The in-place migration can be done using the storage-objectid-migrate setting and the scripts storage-objectid-migrate-mails. Dovecot Backend is connected to the object storage where users’ mails and mail indexes are stored. Dec 12, 2013 · A move from courier to dovecot helped the situation as dovecot uses more efficient indexes but I'm bond to outgrow my current shared-storage. By default all active sessions will be shut down when dovecot is reloaded or restarted. If the 404-object is still listed in this query, Dovecot issues a HEAD to determine if the message actually exists. For cluster optimization, users should be distributed in a way that all backends have approximately equal load (IO, memory, CPU). Sidebar Navigation . Dovecot Pro is a fully supported email backend that is already the platform of choice of the world’s largest Telcos, ISPs and Hosters. DOV-5348: Added dict-expire service, which can be used to periodically delete expired dict-sql rows. noatime: Disable updating atime. This would work regardless of what storage backend Dovecot uses. This typically matters only when user is being moved to another backend and soon back again, or if the user is simultaneously being accessed by multiple backends. Dec 21, 2024 · Dovecot Backends log mail storage operations such as mailbox access, message retrieval and synchronization. Verify the Dovecot configuration files exist and have proper syntax. May 15, 2025 · Under certain circumstances Dovecot may be unable to automatically solve problems with mailboxes. Only Dovecot Pro is built around our unparalleled Palomar architecture. These commands should be run on one of the Dovecot proxies. A longer time can however reduce the number of index bundle uploads. It uses the same versioning as Dovecot in general, e. For more details refer to Migrating Path Based Object Storages to Dictmap. Feb 3, 2021 · Dovecot New Features . As a user is connecting to Dovecot for reading mails, the user’s mail indexes are fetched from the object storage and cached in local file system. Nov 11, 2021 · As Dovecot is an IMAP server, one would normally use an IMAP client to create folders. This is because normally Dovecot doesn't do any unnecessary Cassandra work, so it doesn't notice when these problems happen. Feb 28, 2025 · Dovecot Pro is a full-service email platform that delivers dynamic scalability, high performance, efficient utilization of hardware, and outstanding support to the world’s largest Telcos, ISP's, and Hosters. At a clean dovecot service shutdown this timestamp is marked to be “clean”. DOV-5192: obox: Added "doveadm metacache pull" command. Return to top. Previous message: [Dovecot] NoSQL Storage Backend Next message: [Dovecot] NoSQL Storage Backend Messages sorted by: On Feb 10, 2011, at 11:02 AM, <list at During a split brain both sites may decide that the other site isn’t available and redirect all incoming connections to the local site. All Dovecot indexes, including FTS indexes, are stored in the same storage (including object storage) used to store the mail and index data. Backend layer sizing for physical servers: 4-8 cores per instance. This is not the way to configure the relay connection between the Dovecot submission service and the MTA! That is configured using the relay settings described in the previous section. The userdb_quota_rule is used by userdb prefetch to return the userdb values. Main Navigation . quota = <backend>[:<quota root name>[:<backend args>]] backend. Can also happen with CDMI when Scality indexes are out of sync and obox_autofix_storage = yes . The number of groups should be sized approximately by the number of backends. Dovecot Pro Documentation. X-Dovecot-Auth-Protocol If you want to forward oauth2 authentication to your backend, you can use various ways The object storage plugin for Dovecot is called Obox and is only for the so-called Pro version, which is unaffordable for me. Users can be monitored by their interaction with the various Dovecot services. When a user/folder is accessed for the first time in a new backend, Dovecot lists all the index/mail objects instead of using the locally cached lists. 1. I have glusterfs deployed for a few projects, not using it though as the backend storage for IMAP/SMTP storage. You should try to set it up in a way, that all of a single users connections are accessing her mails via a single "backend" dovecot during a single session. Each Dovecot Backend server always writes only a single such object per folder, which allows storing them with (user, folder, host) primary key and updating the rows on changes, instead of inserting & deleting the rows. Remark: dict [1] quota limits. In this mode, Dovecot is responsible for reading and writing mails to storage and handling all of the email protocols. Link and unlink is a very efficient way of moving a file to a new path within one filesystem. conf plugin section at all, because it always gets overridden This shouldn't happen unless another Dovecot backend was deleting the user's mails at the same time. Object Storage Format¶ Dovecot Backend is connected to the object storage where users’ mails and mail indexes are stored. As the backend is automatically spreading the load on all CPU resources available, it will be more efficient to add more cores to backend instances than to other nodes. When restarting Dovecot, move all the connections to a process that keeps the connections open for a while. Dovecot Proxy Dovecot can be configured for use in "proxy" mode on a single server. As Storage backend it is suggested to use a S3 compatible Storage or AWS S3 see AWS S3 and S3 Compatible Storage for more details on the S3 Storage options. The problem with traditional filesystems is, that they are very limited. May 15, 2025 · Messages are encrypted before written to storage and decrypted after reading. Cache file is typically in memory or in low-latency disk already. Dec 21, 2024 · Dovecot Pro provides a flexible, compliant, high performance lawful interception framework. May 15, 2025 · Dovecot Pro Full Text Search (FTS) is a proprietary, Pro-only FTS plugin. Messages are encrypted before written to storage and decrypted after reading. You most likely want to do this. The IMAP/POP3/LMTP proxies do load balancing and high-availability for the Dovecot Backends. This new command allows to copy metacache from remote backend to local backend. May 15, 2025 · Dovecot sends the following HTTP headers towards storage. In such situations the force-resync command may be helpful. Normalize the username to exactly the mailRoutingAddress field’s value regardless of how the pass_filter found the user. --latest-only Pulling fails if there are newer bundles in storage than at source backend host. The current quota is kept in the specified dictionary. The intention is that when upgrading Dovecot cluster, this setting is first kept as the old Dovecot version. Dec 21, 2024 · Backend Crashes Dovecot doesn't use metacache for users that were accessed before the backend crashed the last time. Installing Dovecot; 1. If activated, when an unexpected 404 is found when retrieving a message from object storage, Dovecot will rescan the mailbox by listing its objects. For best high availability, users should be moved away from a broken backend immediately. Apr 22, 2025 · When a user is accessed in a backend, the backend does a lookup of the metacache_last_host field in Palomar GeoDB and can attempt to pull metacache from that host. Installation Aug 26, 2012 · Backend . max_retries. Its cloud architecture delivers dynamic scalability, high performance, efficient utilization of hardware, and the ability to use multiple storage backends, as well as providing outstanding support from the people that built it. 2. Answer #1. When split brain is over the changes will be merged, so there is no data During a split brain both sites may decide that the other site isn’t available and redirect all incoming connections to the local site. I think the problems encountered with Maildir depend on how the storage is shared. proxy frontend and mail storage backend). Configuring TLS encryption on a Dovecot server; 1. It provides fast and compact indexing of search data. Before writing the indexes to object storage they are cached on the backend in metacache where the index tree structure is unbundled as in traditional Dovecot index structure. The dict (dictionary) quota backend supports both storage and messages quota limits. The maildir quota backend implements Maildir++ quota in Dovecot. OX Dovecot Pro provides the obox mailbox format to efficiently interact with selected object storage systems. However, I could not find any documentation about this, so Im not sure if I remember correctly. Dovecot implements the Maildir++ specification so Dovecot remains compatible with Courier, maildrop, Exim, etc. There are two ways to configure Maildir++ quota limits: Configure the limits in Dovecot. director frontend and mail storage backend). metacache_refresh_index_once_after Default 1. Mailbox. Dec 21, 2024 · Backend layer sizing for physical servers: 4-8 cores per instance. Backend layer can be expanded by adding CPUs and RAM therefore expanding the throughput of the backend node Dovecot Pro. Additionally Dovecot Pro requires a Cassandra cluster which is used via the dictionary functionality in Dovecot Pro. If you used Dovecot 2. This is to make sure there aren't any changes lost when a backend For example if your plugin section has quota_rule=*:storage=100M value and the userdb lookup returns quota_rule=*:storage=200M, the original quota setting gets overridden. 3 The message still exists on the disk. New servers should also be added to the director_mail_servers setting in dovecot. The recommended storage solution for large installations that require high-availability and scalable performance is object storage. Values: Boolean. Notes. Hoping someone here might be able > to help :) > >-Is all of the 'storage' specific code in housed in lib DN Template . The dictionary stores only the On Tue, 2008-04-22 at 20:15 -0700, Earl Dreller wrote: > I'm exploring adding a new storage backend to dovecot, storing mail in some > sort of database, and had a few questions. The Passwd userdb doesn’t support extra fields. Search K . sh to migrate indexes and mails. Mar 28, 2018 · Dovecot is an excellent choice for both small and large installations; however, for larger installations we recommend our commercial solution Dovecot Pro. metacache remove doveadm [GLOBAL OPTIONS] metacache remove [-a metacache_socket_path] user mask If user was accessed this recently, assume the user’s indexes are up-to-date. First, is drop-in replacement for director with no authentication. With IMAP and POP3 logins, the same optimization can be done by using prefetch authentication database and returning userdb info in the DN lookup (a total of two LDAP requests per login in both cases). For example counting 100 groups per backend can allow changing the backend load by 1% increments when moving groups. 3. Aug 28, 2024 · Normally Dovecot attempts to make sure that IMAP UIDs aren't lost even if a backend crashes (or if user is moved to another backend without indexes first being uploaded). The Dovecot authentication process is commonly shown as "dovecot/auth" in the output of the following command: ps -aux | grep dovecot/auth Dovecot storage file format version. This site provides documentation and information on the commercial Dovecot Pro product. For sdbox and mdbox mailboxes the storage files will be also checked. This can have serious consequences if for example storage-related settings are changed, as user connection will be using both old and Dovecot storage file format version. This guarantees that two backend servers don't attempt to modify the same user's mailbox at the same time (which might cause problems). At a clean dovecot service shutdown this timestamp is marked to be "clean". e. I currently have approx 22TB of Raid 5 NAS storage and I have 3TB left so I need to decide on a growth plan. You cannot easily extend it, even with RAID 10 all messages may be lost How often to upload important index changes to object storage? This mainly means that if a backend crashes during this time, message flag changes within this time may be lost. I have been looking at various IMAP servers, and it seems that Dovecot allows for custom storage backends. Backend layer can be expanded by adding CPUs and RAM therefore expanding the throughput of the backend node Messages are encrypted before written to storage and decrypted after reading. I remember reading about the possibility to configure a namespace to point to another imap server (not dovecot) and use it as a backend for storing mails. Google Cloud Storage¶ GCS is similar to AWS in that a “dispersion prefix” is required to properly shard among the Google Cloud storage nodes. See Dovecot Dictionaries for full description of the available backends. Hoping someone here might be able to help :)-Is all of the 'storage' specific code in housed in lib-storage/index? Would adding a new storage backend be as simple as recreating all of the public May 15, 2025 · These commands should be run on one of the Dovecot proxies. 2 When using the virtual plugin with obox, the virtual INDEX location must point to a directory named “virtual” in the user home directory. This document covers configuration specific to the Amazon Web Services S3 (Simple Storage Service). Backend layer can be expanded by adding CPUs and RAM therefore expanding the throughput of the backend node. Add a new backend or change an existing one’s vhost count. Metacache is local to the backend. Completing the Dovecot configuration; 1. Dovecot also comes with the doveadm tool which can manage folders i. May 15, 2025 · Dovecot New Features . May 15, 2025 · The Palomar architecture comprises Dovecot Pro Proxies ("Proxy") and Dovecot Pro Backends ("Backend"), Palomar Cluster Controller ("Controller"), GeoDB, a highly-available shared storage with access to a shared Dictmap server, OX Abuse Shield (optional), and integration with a customer's identity and authentication databases (Passdb/userdb) and Feb 2, 2019 · Quota backend specifies the method how Dovecot keeps track of the current quota usage. See especially the storage-objectid-prefix and storage-passthrough-paths parameters. The proxy is then responsible for forwarding the command to be run in the correct backend. sh, storage-objectid-migrate-index. -k. Next message: [Dovecot] Design: Optimizations for high-latency storage backend Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Mainly intended for future support of key-value (etc. As a user connects to Dovecot to read mails, the user's mail indexes are fetched from the object storage and cached in a local file system. Mailbox List. root_squash: Dovecot doesn’t care about this. This causes very little downtime on that server, so most clients can successfully reconnect back to the server after getting disconnected. Ideally all the groups have equal "load", i. Using PAM as the Dovecot authentication backend; 1. obox_autofix_storage ¶ Default: no. The Backends are organized as a pool of independent nodes. May 15, 2025 · For storage optimization, user should be redirected to the backend where it already has its indexes in metacache. format. The Dovecot Backend does all the hard work of reading and writing mails to storage and handling all of the IMAP/POP3/LMTP protocols. Backends: keeps track of the current quota usage. This way the virtual indexes are added to the obox root index bundles and will be preserved when user moves between backends or when metacache is cleaned. Please note that the login proxy described here is configured between two Dovecot servers (e. The backend health checking is usually done by the Dovemon script (Dovecot Pro only), which automatically scans the backends and determines if they are up or down and uses these doveadm commands to update the backend states. This is done using /var/lib/dovecot/reboots file. read_max_retries=<n> Max number of HTTP request retries for read actions. For Dovecot Pro, and the obox mailbox format, the Backend is connected to the object storage where users' mail data is stored. I found a posting on the mailing list from 2008 "Adding new storage backend to Dovecot" while searching for POP3 and IMAP servers, that allow to use a NoSQL backend rather than a traditional file system. Typically Dovecot doesn’t store any root-owned files in NFS. When starting up, Dovecot gets /proc's ctime and adds it to the reboots file. Installation Feb 3, 2021 · Dovecot New Features . The dovecot_storage_version defaults to the latest version, but can be overridden with -o. When starting up, Dovecot gets /proc’s ctime and adds it to the reboots file. 4. Mail Storage. They should be logged for troubleshooting purposes: X-Dovecot-Username; X-Dovecot-Session-Id; X-Dovecot-Reason; Storage-Side Object Metadata When saving data to object storage, Dovecot stores metadata associated with each blob for data recovery purposes. It tries to fix all problems. I'm trying to set up Dovecot as authenticating reverse proxy, in front of an already running IMAP server to accomplish the following: Have Dovecot authenticate users using Kerberos/GSSAPI (to allow These commands should be run on one of the Dovecot proxies. fs: Filesystem quota; dict: dictionary quota backend (Store quota usage in Files, Redis, SQL) maildir: Store quota usage in Maildir++ maildirsize files. Apr 16, 2025 · Dovecot Backend Dovecot can be configured for use in "backend" mode on a single server. They don’t (usually) specify users’ quota limits, that’s done by returning extra fields from userdb. Dec 21, 2024 · The Palomar architecture comprises Dovecot Pro Proxies ("Proxy") and Dovecot Pro Backends ("Backend"), Palomar Cluster Controller ("Controller"), GeoDB, a highly-available shared storage with access to a shared Dictmap server, OX Abuse Shield (optional), and integration with a customer's identity and authentication databases (passdb/userdb) and During a split brain both sites may decide that the other site isn’t available and redirect all incoming connections to the local site. They can also slow down some NFS servers. Main Navigation The indexes are written lazily to the object storage in order to minimize the object storage I/O. -v. Anyway something similar to #1 could be implemented for it. The next time Dovecot syncs the mailbox (either the session that wrote the record or another one), it goes through all the non-synchronized records in transaction log and applies the requested changes to the backend mailbox. g. The Backend does the primary work of reading and writing mails to storage and handling the bulk of the mail protocol interaction with the client. 2. The indexes are written lazily to the object storage in order to minimize the object storage I/O. The quota backend in dovecot fails to initialize because the quota value stored in LDAP has the S appended to it. 5. --clean Metacache is cleaned for the user(s) that have been successfully pulled. In case of unauthorized access to the storage backend, the messages will, without access to the decryption keys, be unreadable to the offending party. running proxy and backend in the same server). From what I've read, dovecot only supports mbox style file storage, but I'd like to investigate the possibility of using a database instead. Default is 2 Dovecot storage file format version. There are different quota backends that Dovecot can use: Aug 28, 2024 · Dovecot Pro is a full-service email platform that delivers dynamic scalability, high performance, efficient utilization of hardware, and outstanding support to the world’s largest Telcos, ISP's, and Hosters. But from experience can say a few things: First of all I would not recommend anyone use distributed file systems for storage backend on high transactional workloads such as IMAP and SMTP. I'd love some advice regarding spanning storage to the cloud. 3 The doveadm instance commands are used to manage the list of Dovecot instances running on the server. Dovecot Dictionaries¶. Aug 28, 2024 · Dovecot sends the following HTTP headers towards storage. Both Proxy and Backend use structured log format compare to Controller components that use JSON logs as default. This can have serious consequences if for example storage-related settings are changed, as user connection will be using both old and During a split brain both sites may decide that the other site isn’t available and redirect all incoming connections to the local site. moving any of the groups in a backend elsewhere would reduce the backend's load the same amount. Also it would be silly to pay so much money for juste one feature while the rest of the community features is way more than enough for my use case. Dovecot allows keeping mails and index files in clustered filesystems. Default is 2 Main Navigation . When split brain is over the changes will be merged, so there is no data Subject: Re: [Dovecot] Dovecot and SATA Backend Date: Tue, 17 Nov 2009 09:07:31 -0500 (8 cores and 16 Go RAM) with equalogic iSCSI SAN SAS 15K for storage backend. OX Dovecot Pro Full Text Search Backend¶ Dovecot Pro FTS Engine is a proprietary FTS plugin available for OX Dovecot Pro. obox_fs ¶ Default: <empty> Values: String. The message still exists on the disk. I don't know any server or library which provides a well-established, compatible protocol frontend with an open backend API, which could be used to easily make a custom storage backend for the LMTP/POP/IMAP frontend in any language, in any programming paradigm The dovecot_storage_version defaults to the latest version, but can be overridden with -o. Apr 14, 2025 · Most of the deletions Dovecot does are index diff & self-bundle updates. "Make sure cache Please note that the login proxy described here is configured between two Dovecot servers (e. Dovecot doesn’t need this and it may slow down NFS servers. When split brain is over the changes will be merged, so there is no data returns "try again later", Dovecot simply adds a 0 second timeout after which it's called again (that's enough for Dovecot to do some other pending work). What I'm trying to get to is an IMAP server which would query the webservice for folders/messages instead of looking into a local database/mailbox. "mailboxes": doveadm mailbox create INBOX. This requires uploading index bundles whenever expunging recently saved mails. Dovecot New Features . Dovecot implements the Maildir++ specification, so Dovecot remains compatible with Courier, maildrop, Exim, etc. Thanks. In fact, if the lookup always returns a quota_rule field, there's no point in having quota_rule in the dovecot. -k Preserve entire environment for doveadm, not just import_environment . The distributed and scalable NoSQL database is used to support fast Directors are mainly useful for setups where all of the mail storage is seen by all servers, such as with NFS or a cluster filesystem. The user is routed to the backend in the user_backend table. Feb 3, 2010 · Amazon S3¶. read_timeout=< Millisecond Time > passwd¶. If not, list index bundles in object storage (or Cassandra) to see if they have changed. Its cloud architecture delivers dynamic scalability, high performance, efficient utilization of hardware, and the ability to use multiple storage backends, as well as providing outstanding support from the The simplest way to upgrade Dovecot backend is to simply run yum upgrade or apt-get upgrade. Requirements are: Aug 28, 2024 · The Palomar architecture comprises Dovecot Pro Proxies ("Proxy") and Dovecot Pro Backends ("Backend"), Palomar Cluster Controller ("Controller"), GeoDB, a highly-available shared storage with access to a shared Dictmap server, OX Abuse Shield (optional), and integration with a customer's identity and authentication databases (passdb/userdb) and Dec 21, 2024 · Normally Dovecot attempts to make sure that IMAP UIDs aren't lost even if a backend crashes (or if user is moved to another backend without indexes first being uploaded). 3. However, if you wish to use an existing external Redis cluster, set CELERY_BROKER_URL and CELERY_RESULT_BACKEND with the connection details of your Hi, Nearly every popular programming language has an LMTP/POP/IMAP implementation, most of them suck in many different ways. Setting up a Dovecot server with LDAP authentication; 1. So, as shared-all does not work any more, I need to move to a shared-nothing backend storage, unless I want to shell big $$$ for a custom solution, which I don't. Possibly using a separate control connection to avoid making the proxying less efficient in normal operation. Revision: 9c0c912 nordirplus: Disable readdirplus operations, which aren’t needed by Dovecot. Problem #2: Accessing index cache while searching. ) databases, but this is probably useful even for regular disk I/O. When split brain is over the changes will be merged, so there is no data Apr 16, 2025 · All Dovecot Settings; Quick configuration; Dovecot Backend Dovecot can be configured for use in "backend" mode on a single server. Relevant data is captured by hooking into the mail storage API and by parsing protocol data to and from mail access and delivery services (IMAP, POP3 and LMTP). With other mailbox formats you should use Quota Backend: count. Configuration There are few ways you can use this script. This is used by, for example, Quota Backend: dict, Key-value authentication (dict) database, Last Login Plugin, and IMAP METADATA. In most installations there is only one Dovecot instance, but in some cases is may be useful to have more (e. Installation If this is the case, you can still use the storage together with fs-dictmap Configuration. Dec 17, 2023 · You are right that link() is the syscall to create a hard link. S3 does not support hard links and in fact does not even have a "move" or "rename" operation -- renaming/moving objects in S3 requires copying the object to a new path and then deleting the original. It specifies the oldest Dovecot version that must be able to read files written by this Dovecot instance. Setting this to no is dangerous on backend as existing sessions are then not killed when dovecot is restarted or reloaded. Instances are added to the list automatically when Dovecot is started. I am researching using dovecot with an SQL database as the storage backend. Setting up a Dovecot server with LDAP authentication. 0. See also the base S3 configuration in S3-compatible Storages. So is it possible to use Dovecot Directors/Backend but each Backend using its own local storage. Dovecot’s lib-dict can be used to access simple key-value databases. Micha Krause Oct 10, 2012 · Most of the open source IMAP servers (Courier, Cyrus, Dovecot) do support using MySQL as database to keep meta information like list of users and passwords, list of accepted domains, user aliases, etc. This means that both sites could modify the same mailbox simultaneously. It delivers a highly available, distributed email server platform that handles a variety of email storage options, reduces cost and is the reason that Dovecot Pro can easily scale to tens of millions of active users. If user was accessed this recently, assume the user’s indexes are up-to-date. Mail User. No separate permanent storage media is needed for the FTS indexes. Preparing Dovecot to use virtual users; 1. Now instead use: mail_location = imapc: imapc_host = imap. Dovecot Pro Meet The World’s Leading Email Backend Platform Dovecot storage file format version. Then there is no storage and no backend that Dec 21, 2024 · Dovecot Pro Full Text Search (fts-dovecot) Plugin Dovecot Pro Full Text Search (FTS) is a proprietary, Pro-only FTS plugin. The main reason to use DN template is to avoid doing the DN lookup, so that the authentication consists only of one LDAP request. Debug Headers Dovecot sends the following HTTP headers towards storage. That’s why you can’t directly set users’ quota limits to passwd file. I have setup 2 postfix instances and 2 dovecot instances (replicated) but I met Dovecot Director and backend and feel this may be the right way to go for about 10,000 mailboxes but I do not have a SAN or NFS. If no entry exists, the script creates one. Pull all metacache for given user(s) from source backend host. conf and restart the service. If necessary, you might need to restore a default configuration or template file, then rebuild dovecot. I'm exploring adding a new storage backend to dovecot, storing mail in some sort of database, and had a few questions. Apr 16, 2025 · All Dovecot Settings; Quick configuration; Dovecot Backend Dovecot can be configured for use in "backend" mode on a single server. com #imapc_port = 143 # default Nov 8, 2013 · Dovecot proxy <-> backend protocol could be improved to support moving connection to another backend. qssy mzfi ahwq icdui leuos dyvheq uguim evwbt ziiqd kkop