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Cyrus IMAP

Cyrus IMAP

Welcome to Cyrus

  • Introduction to Cyrus IMAP
    • What is IMAP?
  • IMAP Features
    • Security and Authentication
      • Kerberos Authentication
      • LDAP Authentication
      • SQL Authentication
        • Pre-requisites
        • Database structure
        • PAM configuration for use with saslauthd
        • Testing the SASL configuration
        • Create the test mailboxes within Cyrus
        • Testing everything together
      • Access Control
        • Discretionary Access Control
      • Sealed System Design
    • Mailbox Management
      • Automatic Creation of Mailboxes
        • Autocreation of mailboxes
        • Automatic quota settings
        • Autocreation of Sieve scripts
        • Automated folder subscriptions
        • Autocreation of users
      • Mailbox Namespaces
        • Namespace Convention: netnews
        • Namespace Convention: “not netnews”
        • Alternate Namespace
        • Internal Namespace
        • Administrator Namespaces
        • Personal Namespace
        • Other Users Namespace
        • Shared Namespaces
      • Mailbox Annotations (METADATA)
      • Mailbox Distribution
        • Partition Selection Mode
        • Backend Selection Mode (Cyrus IMAP Murder)
    • Message Management
      • Delayed Delete
        • Configuring Cyrus IMAP for Delayed Delete
      • Delayed Expunge
        • Configuring Cyrus IMAP for Delayed Expunge
      • Message Annotations (METADATA)
      • Duplicate Message Delivery Suppression
      • Shared Seen State
      • Server Side Filtering (Sieve)
      • Event Notifications
        • Available Event Notifications
        • Example Event Notifications
    • Storage
      • Mail Spool Partitions
        • Storage Tiering with Partitions
        • Restricting Storage Used with Partitions
      • Mailbox Metadata Partitions
      • Quota
      • Single-Instance Store
    • Load Management
      • Cyrus IMAP Murder (Server Aggregation)
        • Use-Cases for the Cyrus IMAP Murder
        • Cyrus IMAP Murder Topologies
  • Support
    • Reporting Bugs
    • Mailing Lists
    • Online Meetings
  • About
    • What is Cyrus
      • What is Cyrus
      • What is IMAP?
      • IMAP Version 4 (IMAP4)
      • Mime
      • SMTP
    • Who Is Cyrus
      • Core Contributors
      • Individual contributors and past contributors
    • Cyrus Roadmap
      • High Level Roadmap
        • 2.6 (Future)
        • 2.5
        • 2.4.x
        • 2.2.x and 2.3.x
        • pre 2.2
    • Cyrus History
    • Cyrus Bylaws
      • I. The Cyrus Governance Board
      • II. The Cyrus Core Developers Group
      • III. The Release Engineer
      • IV. The Cyrus Roadmap
      • V. Development Process
      • VI. Changes to the Bylaws

Administrators

  • IMAP Installation Guide
    • Installation Using Packages
      • CentOS
        • Other Versions of Cyrus IMAP
      • Debian
      • Fedora
        • Other Versions of Cyrus IMAP
      • openSUSE
      • Red Hat Enterprise Linux
        • Other Versions of Cyrus IMAP
      • Ubuntu
      • Open Build System Packages
        • 2.5 Series
        • 2.4 Series
    • Build and Install Yourself
      • Do It Yourself
        • From GIT
        • From Tarball
        • Build Dependencies
        • Configure the Build
    • External Tools
    • Licensing
  • IMAP Configuration Guide
    • A Guide to Planning a Cyrus IMAP Deployment
    • Contents
      • Overview and Concepts
        • Cyrus IMAP
        • Cyrus IMAP Features
        • Initial ACLs for Newly Created Mailboxes
        • Login Authentication
        • Quota
      • HTML Block that was commented out in XML
        • Partitions
      • Deployment Scenarios
        • Single Server Deployments
        • Multi Server Deployments
      • Cyrus IMAP Murder
        • The Discrete Murder
        • The Unified Murder
        • The Shared Murder
      • Cyrus Replication
      • Hosted Environments
      • Mailbox Creation Distribution
      • Mailbox Creation Distribution
        • Selection Mode
      • Usage convergence
      • Computed weight
      • Special cases
        • What happens when two partitions are equal as most fitting?
        • What happens when two partitions point to the same device?
        • Partitions Exclusion
        • Partitions Usage Data Reset
      • Mailbox Creation Distribution Through murder frontend
        • Selection Mode
        • Available Selection Modes on Frontend
      • Backends Exclusion
      • Backends Usage Data Reset
      • Known Protocol Limitations
        • POP3 and Mailbox Locking
        • Cyrus IMAP POP3 Implementation
      • Authentication and Authorization
        • Client Authentication
        • Users and Mailboxes
      • Performance Recommendations
        • Databases on Temporary Filesystems
      • Storage Considerations
        • General Notes on Storage
        • Redundancy
        • Availability
        • Performance
        • Scalability
        • Capacity
        • Cost
      • Supported Platforms and System Requirements
        • Building Cyrus IMAP
        • Required Software Components
        • Recommended Software Components
        • Recommended Software Components Enabled by Default
  • IMAP Administrator Guide
    • Overview
      • System Architecture
        • High Level Architecture
        • Cyrus Murder
        • Replication
        • Invoking Cyrus
    • Management
      • Cyrus Murder
        • Cyrus Murder: Concepts
        • Cyrus Murder: Installation and Administration
        • Cyrus Murder Mupdate Details
        • Cyrus Murder Failure Modes
        • Cyrus Murder Mail Delivery
      • Access Control
        • Combining Access Rights
        • Access Control Defaults
        • Access Control Lists Rights Reference
        • Discretionary Access Control
      • Cyrus NNTP
        • Overview
        • NNTP Setup
        • Defining Newsgroups
        • Configuration
        • Further information
      • Cyrus Prot Layer
        • Events
      • Cyrus Sieve
        • Introduction
        • Installing Sieve
        • Managing Sieve Scripts
        • Testing the sieve server
        • Cyrus Sieve Support
        • Writing Sieve
      • Standard Operating Procedures
        • Replication: Installation and Administration
        • Mailbox Operations
        • Reloading Cyrus IMAP Services
        • Alternative Namespace
        • Database Conversion, Export and Import
        • Deleting and Undeleting Messages and Folders
        • Cyrus Virtual Domains
        • Running Cyrus IMAP Services on Non-Standard Ports
        • Reconstructing Mailboxes
        • Using Squatter for Faster IMAP SEARCH
        • Splitting Metadata from Partitions
        • Managing user_deny.db
      • Cyrus Event Source
        • Overview
        • Compile options
        • Configuration options
        • Event Types
        • Accessing events
        • Apple Push Service
      • Mailbox Distribution
        • Selection Modes
        • Special cases
        • Application
      • HOWTO: Using an NGINX IMAP Proxy
      • Tweaking Cyrus IMAP
        • Storage Tiering
        • Synchronous File Operations
    • References
      • Administrative Commands & Utilities
        • List of Configuration Files, Formats and Settings
        • List of System Command-line Utilities
        • List of User Command-line Utilities
        • Work-in-Progress
      • PyCyrus Commands & Utilities
        • undelete-mailbox
      • Tools & Utilities
        • arbitron
        • arbitronsort.pl
        • chk_cyrus
        • convert-sieve.pl
        • ctl_cyrusdb
        • ctl_deliver
        • ctl_mboxlist
        • cvt_cyrusdb
        • cvt_cyrusdb_all
        • cyr_dbtool
        • cyr_df
        • cyrdump
        • cyr_expire
        • fetchnews
        • cyr_sequence
        • cyr_synclog
        • cyr_userseen
        • masssievec
        • mbexamine
        • mbpath
        • migrate-metadata
        • mkimap
        • mknewsgroups
        • rehash
        • translatesieve
        • undohash
        • upgradesieve
      • Access Control Lists Rights Reference
    • Other
      • Notes for Packagers
        • Services in /etc/services
  • IMAP Frequently Asked Questions
    • Features
      • Which database backend should I use for which databases?
      • Duplicate Delivery Suppression
    • Installation Problems
      • Compilation errors about kssl.h and krb5.h on Red Hat Linux/Fedora
      • Problems detecting Berkley DB on Red Hat Linux
      • Help! There must be an easier way to get all this going…
    • Common Feature Requests
      • Does the Cyrus Murder support High Availability configurations?
      • Can I configure pop3d to log amount and size of messages fetched by user?
      • How can I make CyrusSieve work with public shared folders?
      • Can I have subfolders not appear under INBOX?
    • Common Operational Questions
      • How do I view ACLs on a mailbox?
      • What annotations are available?
      • Why does ctl_cyrusdb -r take so long with Berkeley DB?
      • Is it safe to put configdir/proc and configdir/lock on a tmpfs filesystem?
      • Is the “db3: x Lockers” log message harmful?
      • Why can I not delete a mailbox as an admin user?
      • When is What … Deleted, Expired, Expunged or Purged?
        • Users and IMAP Clients Deleting Messages
        • Deleting Folders
        • Where are the Messages?
      • Why is deliver.db so large?
      • I have multiple imapd-SERVICES configured and experience occasional freezes when I try to log in!
      • Cyrus delivers claims that the mailbox does not exist
      • Why is mail being rejected with No Mailbox found due to MiXed CaSe incoming e-mail?
      • Can I use MySQL (or another SQL database) as the primary mail store?
      • Why do POP3 connections take so long, but once the connection is established all is well?
      • Why does reconstruct -m not work?
      • Shared File Systems GPFS for high availability
      • How to enable telemetry
      • The process count keeps growing!
        • 1. Reuse count
        • 2. Maximum child count
        • 3. Clean up connections that are no longer in use
      • “unable to join environment” error
      • Why does Cyrus set the MAIL FROM address of the sender of vacation responses to ‘<>’?
    • Common Interoperability Problems
      • Why does Cyrus reject 8-bit characters in the headers of my messages?
      • Why does Cyrus reject messages with “bare newlines”?
      • How do I get Cyrus Sieve to play nice with Exim?
      • Why does mail delivery go slow or hang sometimes?
  • IMAP Release Notes
    • Currently Stable Version
    • Current Development Version
    • Currently Supported Product Series
      • Series 2.5
        • Cyrus IMAP 2.5 Releases
      • Series 2.4
        • Cyrus IMAP 2.4 Releases
        • Cyrus IMAP 2.4-caldav Releases
    • All Versions Going Back Way Back When
      • Series 1
        • Cyrus IMAP 1.x Release Notes
      • Series 2: 2.0 - 2.3
        • Cyrus IMAP 2.0.x Release Notes
        • Cyrus IMAP 2.1.x Release Notes
        • Cyrus IMAP 2.2.x Release Notes
        • Cyrus IMAP 2.3 Releases

Developers

  • Contribute
    • Contribute Financially
    • Website Content Contributions
    • Contribute Code
  • IMAP Developer Guide
    • Getting Started
      • Overview of Cyrus development environment
        • The pre-requisites
        • The components
      • Developer Environment Installation
        • Cyrus
        • Arcanist
        • Setting up syslog
      • Running a basic server
        • 1. Update your system
        • 2. Install Cyrus 3rd party dependencies
        • 3. The cyrus:mail user
        • 4. Setting up authentication with SASL
        • 5. Enabling mail delivery with LMTP
        • 6. Protocol ports
        • 7. Configuring Cyrus
        • 8. Launch Cyrus
        • Optional: Setting up SSL certificates
        • Sending a test email
        • Checking carddav
        • Checking caldav
        • Troubleshooting
      • Developer Test Environment
        • Installing Cassandane
        • Rebuild Cyrus for Testing
        • Running the tests
        • Tips and Tricks
      • Development Process
        • Coding Style
        • Making changes
        • Useful Developer Information
        • Community Participation
      • System Architecture
        • High Level Architecture
        • Cyrus Murder
        • Replication
        • Invoking Cyrus
      • JMAP support
        • Cyrus administration
        • JMAP client
        • JMAP implementation in Cyrus
      • Contributing to documentation
        • Overview
        • Documentation Tools
        • Checking the files
        • Submitting updates
        • Special Tags
        • Conventions: Man Pages
    • Resources
      • Developer Libraries
        • List of Libraries
      • Docker Images
        • Quick Notes
        • Environment Variables
        • Running the Tests Yourself
        • Getting an Interactive Shell
        • Functions for Your Convenience
        • Build Process Steps
    • Continuous Integration
      • Error Message: Step pre-configure fails on (…)
      • Error Message: Step configure fails on (…)
      • Error Message: Step make fails on (…)
      • Error Message: Step make-check fails on (…)

Cyrus SASL

  • SASL Getting Started
    • SASL
    • SASL Authentication Mechanisms
    • Security Layers
    • Channel Binding
    • Realms
    • Protocols
    • Cyrus SASL
    • The Glue Library
    • Auxiliary Properties
    • Plugins
  • SASL Auxiliary Properties
    • Auxiliary Properties and the Glue Layer
    • Passwords and other Data
    • sasldb
    • ldapdb
    • sql
    • User Canonicalization
  • SASL Authentication Mechanisms
    • EXTERNAL
    • ANONYMOUS
    • PLAIN
    • LOGIN
    • CRAM-MD5
    • DIGEST-MD5
    • SCRAM-SHA-1
    • GSSAPI
    • GS2-KRB5
    • GS2-IAKERB
    • NTLM
    • SRP
    • PSSDSS
    • OTP
    • Non-SASL Authentication
  • SASL Pwcheck
    • Auxprop
    • Auxprop-hashed
    • Saslauthd
    • Authdaemon
    • Alwaystrue
    • Auto Transition
  • SASL Frequently Asked Questions
    • What is the difference between an Authorization ID and a Authentication ID?
    • Why do CRAM-MD5 and DIGEST-MD5 not work with CyrusSaslauthd?
    • How do I configure OpenLDAP +SASL+GSSAPI?
    • Why does CyrusSasl store plaintext passwords in its databases?
    • Why am I having a problem running dbconverter-2 to upgrade from SASLv1 to SASLv2?
 
Cyrus IMAP
  • Docs v2.5.17 »
  • Administrator Guide »
  • SASL Frequently Asked Questions
  • Edit on GitHub

SASL Frequently Asked Questions¶

  • What is the difference between an Authorization ID and a Authentication ID?
  • Why do CRAM-MD5 and DIGEST-MD5 not work with CyrusSaslauthd?
  • How do I configure OpenLDAP +SASL+GSSAPI?
  • Why does CyrusSasl store plaintext passwords in its databases?
  • Why am I having a problem running dbconverter-2 to upgrade from SASLv1 to SASLv2?

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