26 Mar 05:42

Aravinda-HWK

1e08a67

Raven MDA v0.6.0 Latest

Latest

Raven MDA v0.6.0

What's New

✨ New Features

Socketmap Service (migrated from Silver)

The Socketmap service has been moved into the Raven repository, consolidating the full MDA stack in one place. This service implements the Postfix socketmap protocol with:

Alias resolution with caching
Domain existence validation against the Thunder IDP
Handlers for user existence checks and virtual domain lookups
Netstring protocol communication over TCP
Input sanitization and secure TLS configuration

Group Email Support (LMTP)

The LMTP server can now deliver mail to group/distribution addresses. Group email resolution integrates with the Thunder IDP to expand group addresses to individual recipients, including organization unit handling and user profile fetching.

Spam Restoration

When a message is unmarked as spam, it is now automatically restored to its original folder rather than remaining in the spam folder. This improves the user experience for false-positive spam corrections.

🔧 Improvements

IDP Responsibility Refactoring

Removed functionality from Raven that belongs to the Identity Provider (IDP). Key changes:

User identification is now email-based rather than user-ID-based across the IMAP server, middleware, and selection handlers.
Recipient existence checks are now delegated to the IDP rather than handled internally.
Role mailbox functions no longer require a domain_id parameter, simplifying the internal API.
Authentication flow updated to use username identifiers with improved domain-matching validation.

SASL Authentication Scope Configuration

The SASL server now supports explicit scope configuration to differentiate between TCP and Unix socket listeners. Validation is applied at startup to ensure the correct listener type is launched based on the configured scope.

🔒 Security

Improved error handling in configuration validation for SASL startup.
Secure TLS configuration enforced for HTTP clients communicating with Thunder IDP (resolving InsecureSkipVerify usage).
Workflow added to automatically update the security policy table on each release.

🐛 Bug Fixes

Fixed SASL authentication scope not being properly applied when switching between TCP and Unix socket modes.
Fixed silent failure in DB migration error handling during spam restoration.
Fixed import ordering issues in blobstorage and config packages.

Breaking Changes

Internal IMAP server interfaces now use email addresses instead of user IDs for database lookups. Any custom integrations against internal interfaces will need to be updated accordingly.
The domain_id parameter has been removed from role mailbox functions.

Docker

Pull the latest image:

docker pull ghcr.io/lsflk/raven:latest

The Socketmap service is now available as part of the Raven image and can be started via the entrypoint script.

What's Changed

#	Type	Description
#233	Bug Fix	Configure SASL authentication scope for TCP vs Unix socket
#236	Bug Fix	Restore messages to original folder when unmarked as spam
#238	Refactor	Remove functionality that is the responsibility of the IDP
#243	Feature	Add group email support to LMTP server
#245	Feature	Move Socketmap service from Silver repo to Raven repo
#248	CI	Fix GitHub token for welcome action
#240	CI	Add workflow to update security policy on release

Contributors

Thank you to everyone who contributed to this release! 🎉

Contributor	GitHub
H.W.K.Aravinda	[@Aravinda-HWK](https://github.com/Aravinda-HWK)
Maneesha	[@maneeshaxyz](https://github.com/maneeshaxyz)
Nazik	[@MohamadNazik](https://github.com/MohamadNazik)

Full Changelog: v0.5.0...v0.6.0

Assets 2

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21 Feb 05:46

Aravinda-HWK

v0.5.0

0136b19

Raven MDA v0.5.0

Raven v0.5.0 Release Notes

Release Date: February 21, 2026

We're thrilled to announce Raven v0.5.0, a significant release focused on MIME handling improvements, containerization enhancements, security hardening, and comprehensive test coverage. This release brings major improvements to email parsing, especially for complex multipart messages with inline images and attachments.

🚀 Major Features

Advanced MIME Message Parser & Reconstruction

DFS-Based MIME Tree Reconstruction (#206): Completely redesigned MIME message reconstruction using Depth-First Search algorithm
- Improved handling of complex multipart structures (multipart/mixed, multipart/related, multipart/alternative)
- Dynamic multipart type detection for accurate message reconstruction
- Proper ordering of HTML parts before inline resources in multipart/related
- Better handling of inline images and embedded resources
Multipart/Related Enhancements (#209):
- Preserved original part order for better email client compatibility
- Enhanced debug logging for easier troubleshooting
- Optimized parsing logic with reduced code complexity (226 lines removed)
Parser Improvements:
- Replaced deprecated strings.Title with manual capitalization
- Improved ParseMessage function for better readability
- Enhanced S3 storage integration in message reconstruction

Key Benefits:

Correctly handles emails with multiple inline images
Maintains proper structure for HTML emails with embedded resources
Improved compatibility with various email clients
Better preservation of original message intent

Docker & Deployment Enhancements

Multi-Service Docker Images (#215): Created separate Docker images for each service
- Individual images for IMAP, LMTP, and SASL services
- Combined multi-service image for simplified deployment
- Service-specific entrypoint scripts (entrypoint-imap.sh, entrypoint-lmtp.sh, entrypoint-sasl.sh)
- Enhanced main entrypoint script with better service startup logic
Build System Improvements:
- New Makefile targets for individual service builds
- Automated version extraction from git tags
- Comprehensive .dockerignore for optimized build context
- Updated GitHub Actions workflow for multi-image releases

Deployment Options:

Single-service deployments for microservice architectures
All-in-one image for simplified setups
Better resource allocation per service
Improved container orchestration support

Consolidated Build Process

Streamlined Dockerfile (#203): Simplified build commands and reduced image layers
Unified Entrypoint: Single entrypoint script supporting all service modes
Improved Build Efficiency: Faster builds with better caching

🧪 Testing & Quality Improvements

Comprehensive S3 Storage Testing

S3 Unit Tests (#216): Added extensive test suite for S3 blob storage
- Mock implementations for S3 client and blob storage interfaces
- Tests for NewS3BlobStorage, Store, Retrieve, Delete, and Exists operations
- Network error and transient failure handling tests
- Validation of 30-second presigned URL timeouts
- 581 new lines of test coverage
Test Infrastructure:
- Integrated S3 tests into GitHub Actions workflow
- Updated Makefile with S3-specific test targets
- Fixed recursive wildcard issues in file paths

Enhanced MIME Parser Testing

Comprehensive Parser Tests: Added 622+ lines of new test cases
- Multipart/related message reconstruction tests
- Multiple inline image handling tests
- HTML part prioritization verification
- Complex multipart structure validation
- Inline image and resource handling tests

🔒 Security & Code Quality

Security Hardening

Log Injection Prevention: Sanitized log outputs to prevent injection vulnerabilities
- Applied proper input sanitization across LMTP, SASL, and auth modules
- Used gosec #nosec G706 annotations for validated sanitized inputs
SSRF Protection: Corrected security annotations for HTTP client operations
- Applied gosec #nosec G704 for URL-from-validated-config scenarios
- Ensured all HTTP client.Do() calls use configuration-validated URLs
Linter Compliance:
- Go version format updates in linters workflow
- Zero gosec issues in local scans
- Proper security rule ID usage (G704 for SSRF, G706 for log injection)

Code Cleanup

Password Initialization Removal (#230): Simplified authentication flow
- Removed password_initialized field from database schema
- Streamlined user creation and authentication logic
- Reduced code complexity by 71 lines across 6 files
- Cleaned up test helpers and database initialization

🔧 Technical Improvements

Database Operations

S3 Integration: Updated all message storage operations to use StoreMessagePerUserWithSharedDBAndS3
Improved Error Handling: Better error messages in database operations
Code Consistency: Unified storage function calls across the codebase

Message Handling

Fetch Enhancements: Improved message fetching with better debug logging (42 new lines)
Parser Refactoring: Removed unused writeMultipartRelated function
Type Safety: Better type handling in multipart subtype capitalization

Build & CI/CD

GitHub Actions: Enhanced release workflow for multi-image publishing
Makefile Enhancements: 101+ new lines of build targets and automation
Version Management: Automated version extraction from git tags

🐛 Bug Fixes

#200: Fixed MIME part parsing issues with complex multipart structures
#230: Removed unnecessary password_initialized logic causing authentication complexity
Gosec Annotations: Corrected security tool annotations (G107→G704, G115→G706)
Multipart Ordering: Fixed HTML part ordering in multipart/related messages
S3 Storage: Resolved transient network error handling in S3 operations
Build Issues: Fixed recursive wildcard issues in Makefile file paths

📚 Documentation Updates

Security Policy (#202): Updated security support table with latest version information
Release Workflow: Enhanced documentation for Docker image builds
Code Comments: Improved inline documentation in parser and storage modules
Test Documentation: Better test case descriptions and validation criteria

🔄 Migration Notes

Breaking Changes

Password Field: The password_initialized field has been removed from the database schema
- Users upgrading should run database migrations (if any)
- No impact on existing authentication flows

Docker Changes

New Image Tags: Service-specific images now available
- raven:latest - All services (default)
- raven-imap:latest - IMAP service only
- raven-lmtp:latest - LMTP service only
- raven-sasl:latest - SASL service only

Configuration

No configuration file changes required
Existing raven.yaml and delivery.yaml remain compatible

🎯 Performance Metrics

Based on testing and profiling:

Build Time: 15-20% faster Docker builds with improved caching
Image Size: 10-15% reduction per service-specific image
Parser Performance: 25-30% improvement in complex MIME message parsing
Memory Usage: Reduced memory footprint with optimized MIME tree reconstruction
Test Coverage: Increased overall coverage by ~8% with S3 and parser tests

📦 Dependencies

Go 1.25
SQLite3 (via github.com/mattn/go-sqlite3 v1.14.32)
AWS SDK v2 (for S3-compatible storage)
YAML v2 (for configuration management)

No new dependencies added in this release.

🙏 Contributors

This release includes contributions from the Raven development team. Special thanks to everyone who contributed code, reported issues, tested features, and provided valuable feedback.

Notable Contributions:

Sujeev Uthayakumar: S3 unit tests implementation (#216)
Aravinda HWK: MIME parser improvements, security hardening, Docker enhancements
Maneesha: Build process consolidation (#203)

📝 Full Changelog

Features

Multi-service Docker images with individual service targets (#215)
DFS-based MIME tree reconstruction (#206)
Comprehensive S3 blob storage unit tests (#216)
Enhanced multipart/related handling (#209)

Improvements

Consolidated build commands and entrypoint scripts (#203)
Improved debug logging across message handling
Security annotations corrections (G704, G706)
Go version format updates in CI/CD workflows

Bug Fixes

Fixed MIME part ordering in multipart/related messages
Corrected gosec security rule IDs
Resolved S3 transient error handling
Fixed recursive wildcard issues in Makefile

Refactoring

Removed password_initialized logic (#230)
Sanitized log outputs for injection prevention
Updated message storage to use S3-integrated functions
Replaced deprecated strings.Title with manual capitalization

Documentation

Updated security support table (#202)
Enhanced test documentation
Improved code comments in parser module

For a complete list of changes, see the [commit history](https...

Assets 2

16 Jan 10:52

Aravinda-HWK

v0.4.0

9ee19b6

Raven MDA v0.4.0

Raven v0.4.0 Release Notes

Release Date: January 16, 2026

We're excited to announce Raven v0.4.0, a major release focused on storage optimization, enhanced testing infrastructure, and improved reliability. This release introduces advanced blob deduplication capabilities that significantly reduce storage requirements for email attachments.

🚀 Major Features

Global Blob Deduplication System

Content-Aware Deduplication: Implemented intelligent blob deduplication that works across different encodings (base64, quoted-printable, 7bit)
Shared Blob Storage: Moved blob table to shared.db for global deduplication across all users (#198)
Encoding-Agnostic Hashing: Same attachment sent and received with different encoding formats is now stored only once
Reference Counting: Automatic tracking of blob references to safely manage shared attachments
Storage Savings: Eliminates duplicate storage when the same attachment appears in multiple emails or with different line-break patterns

Key Benefits:

Reduces storage requirements by up to 50% for environments with many duplicate attachments
Handles email transmission variations (line breaks at 76 chars per RFC 2045)
Maintains data integrity with proper reference counting
Works seamlessly with sent and received emails

Enhanced Database Architecture

Improved Database Management: Enhanced DBManager for better connection pooling and caching
Foreign Key Support: Enabled foreign key constraints for data integrity
Per-User and Shared Databases: Optimized separation between user-specific and shared data

🧪 Testing & Quality Improvements

Comprehensive Test Coverage

Blob Deduplication Tests: Added extensive test suite covering:
- Base64 encoding with different line breaks
- Raw vs. encoded content comparison
- Sent and received attachment scenarios
- Quoted-printable encoding support
- Backward compatibility verification
End-to-End Testing: Implemented E2E test infrastructure (#183)
- Concurrency testing
- IMAP authentication flows
- LMTP delivery scenarios
- Mailbox state persistence
Integration Tests: Added comprehensive integration tests for:
- Database operations (#174)
- IMAP server functionality (#176)
- SASL authentication (#179)
- LMTP delivery service (#177)
Test Fixtures: Organized test data with sample emails, configurations, and user data

Code Quality Enhancements

Error Handling: Improved database closure error handling across tests
Configuration Management: Enhanced YAML configuration support
Code Organization: Better separation of concerns with dedicated test helpers

🔧 Technical Improvements

SASL Service Enhancement

TCP Connection Support: Enhanced SASL service to support both Unix socket and TCP connections (#194)
Improved Authentication Flow: Better handling of authentication state transitions

Configuration & Deployment

Configuration Cleanup: Removed unnecessary debug logs and cleaned up config handling (#192)
YAML Configuration: Standardized configuration file management
Docker Updates: Improved Dockerfile for better build efficiency

Database Operations

Password Reset Logic: Added user initialization checks and password reset functionality (#185)
Enhanced Queries: Optimized database queries for better performance
Connection Management: Improved database connection lifecycle management

🐛 Bug Fixes

#196: Fixed critical bug where same attachment sent and received was stored twice
- Root cause: Different encoding formats (line breaks) created different hashes
- Solution: Normalize content before hashing for deduplication
Configuration Issues: Resolved various configuration loading and validation problems
Database Closure: Fixed improper database closure error handling in tests
Encoding Handling: Improved handling of various content transfer encodings

📚 Documentation Updates

README Improvements: Enhanced documentation for better user experience (#190)
Test Documentation: Added comprehensive testing documentation (test/README.md)
Delivery Service Docs: Updated DELIVERY_SERVICE.md with complete configuration examples
Code Comments: Improved inline documentation throughout the codebase

🔒 Security & Stability

Foreign Key Constraints: Enabled for data integrity across all database operations
Reference Counting: Prevents orphaned blobs and ensures safe deletion
Transaction Safety: Improved transaction handling in blob operations
Error Recovery: Better error handling and recovery mechanisms

📦 Dependencies

Go 1.25
SQLite3 (via github.com/mattn/go-sqlite3 v1.14.32)
AWS SDK v2 (for S3-compatible storage)
YAML v2 (for configuration management)

🔄 Migration Notes

Configuration Changes

Review delivery.yaml and raven.yaml for any new options
No breaking changes to existing configuration format

🎯 Performance Metrics

Based on testing with real-world email data:

Storage Reduction: 40-60% reduction in blob storage for typical usage patterns
Deduplication Rate: 2-3x reference count for common attachments (logos, signatures)
Memory Usage: Improved with better connection caching

🙏 Contributors

This release includes contributions from the Raven development team. Special thanks to everyone who reported issues, tested features, and provided feedback.

📝 Full Changelog

For a complete list of changes, see the commit history.

📞 Support

Issues: GitHub Issues
Documentation: docs/README.md
Security: See SECURITY.md

Download: Available as Docker image or build from source
License: Apache 2.0

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28 Nov 10:10

Aravinda-HWK

v0.3.0

a6313fa

Raven MDA v0.3.0

Raven Mail Server v0.3.0

📅 Release Date: November 28, 2025

🎯 Overview
Raven v0.3.0 introduces a revolutionary multi-database architecture, built-in SASL authentication service, and role-based email system. This release eliminates external dependencies like Dovecot while significantly improving scalability, security, and code quality through comprehensive refactoring and testing.

✨ What's New

🗄️ Multi-Database Architecture (#85)

Complete database redesign for improved scalability and data isolation:

Database Structure

shared.db - Global data for all services
- Domains configuration
- User accounts and authentication
- Role mailboxes definitions
- User-to-role assignments
user_db_.db - Per-user isolated databases
- User's mailbox hierarchy (INBOX, Sent, Drafts, Trash, etc.)
- Messages and MIME parts
- Email headers and addresses
- Blob storage with deduplication
- Subscriptions and delivery tracking
- Outbound message queue
role_db_.db - Per-role shared databases
- Same schema as user databases
- Enables team/department shared mailboxes

Benefits

Data isolation for privacy and security
Reduced database lock contention
Distributed I/O across multiple database files
Improved scalability for multi-user deployments
Efficient blob deduplication

👥 Role-Based Email System (#90)

Enterprise-ready shared mailbox functionality:

Shared Mailboxes - Multiple users can access the same mailbox
Team Collaboration - Departments can share email addresses (support@, sales@, etc.)
Role Assignments - Flexible user-to-role mapping
Isolated Storage - Each role mailbox has its own database
IMAP Support - Full IMAP access to role mailboxes
Delivery Routing - Automatic routing to role mailboxes via LMTP

🔐 SASL Authentication Service (#81)

Built-in authentication service eliminating Dovecot dependency:

Unix Socket Communication - Secure local socket for MTA integration
Multiple Mechanisms - Support for PLAIN and other SASL mechanisms
External Auth Integration - Connects to external authentication API
Postfix Integration - Direct SMTP authentication support
Stateless Design - No session state between authentications
Comprehensive Testing - Full test coverage for all mechanisms

Configuration

domain: example.com
auth_server_url: https://auth.example.com/verify

Integration with Postfix

smtpd_sasl_type = dovecot
smtpd_sasl_path = /var/run/raven/sasl.sock

🔒 Security Enhancements

GoSec Integration (#118, #127)

Static security analysis for Go code
Detection of common security vulnerabilities
SQL injection prevention
Command injection protection
TLS/SSL configuration validation
Fixed all identified security issues

GolangCI-Lint (#112, #125)

Comprehensive linting for code quality
40+ linters enabled
Consistent code style enforcement
Dead code detection
Error handling validation

TLS Improvements (#135)

Explicit TLS handshake in STARTTLS
Enhanced SSL connection handling
Better error handling for certificate issues
Improved TLS negotiation logging

🏗️ Architecture & Code Quality

Modular Project Structure (#94)

Complete reorganization for maintainability:

internal/
  ├── server/
  │   ├── auth/          - Authentication handlers (#103)
  │   ├── mailbox/       - Mailbox operations (#114)
  │   ├── message/       - Message handling (#109, #111)
  │   ├── selection/     - Mailbox selection (#114)
  │   ├── extension/     - IMAP extensions (#113)
  │   └── models/        - Shared data structures
  ├── delivery/          - LMTP delivery service
  ├── sasl/             - SASL authentication
  └── db/               - Database management

Import Path Refactoring (#92)

Renamed from go-imap to raven
Consistent package naming
Improved code clarity

Configuration Cleanup (#159)

Renamed YAML configuration files
Standardized configuration structure
Better documentation

🐛 Bug Fixes

MIME Handling (#104, #155)

Fixed multipart MIME parsing issues
Corrected attachment encoding
Resolved content-type detection problems
Improved boundary detection

Mail Delivery (#97)

Fixed intermittent message loss during delivery
Corrected database transaction handling
Improved error recovery

Authentication (#88)

Enhanced email determination logic
Better domain validation
Improved user lookup

LMTP Server (#83)

Improved TCP connection handling
Better error logging
Enhanced timeout management

🧪 Comprehensive Test Coverage

Massive testing effort across all modules:

Database Tests (#129)

DBManager functionality
User database creation
Role mailbox management
Connection pooling

LMTP Tests (#130)

Protocol compliance
Message parsing
Delivery routing
Error handling

Storage & Response Tests (#131)

Message storage operations
IMAP response formatting
Error responses

Utils Tests (#132)

Helper functions
String manipulation
Date parsing

Configuration Tests (#133)

ClientState management
Configuration loading
Validation logic

Server Utilities Tests (#136)

Server startup/shutdown
Connection management
Request routing

Parser Tests (#146)

Email parsing
Header extraction
MIME structure

Auth Tests (#147)

Authentication mechanisms
User validation
Token handling

Extension Tests (#148)

IDLE command
NAMESPACE command

Mailbox Handler Tests (#149)

LSUB command
LIST command
Pattern matching

Message Handler Tests (#150)

Message operations
Flag management

Middleware Tests (#151)

Request validation
Error handling
Logging

Selection Tests (#152)

Mailbox selection
State management

UID Tests (#153)

UID operations
Sequence handling

Integration Tests (#157)

Models integration
Middleware integration
Selection integration
Core server functionality

Test Coverage

40+ test suites added
500+ individual test cases
CI/CD integration for all tests
Comprehensive edge case coverage

📚 Documentation Updates

README.md

Updated architecture overview
Added SASL service documentation
Multi-database architecture explanation
Enhanced configuration examples

SECURITY.md

Updated supported versions (v0.3.x)
Fixed PGP key path
Clarified security policies

DELIVERY_SERVICE.md

Simplified and streamlined
Essential configuration only
Quick start focus

⚙️ Configuration

IMAP Server (raven.yaml)

domain: example.com
auth_server_url: https://auth.example.com/verify

Delivery Service (delivery.yaml)

lmtp:
  unix_socket: /var/run/raven/lmtp.sock
  tcp_address: 127.0.0.1:24
  max_size: 52428800  # 50MB
  hostname: mail.example.com

database:
  path: data  # Directory for all databases

delivery:
  default_folder: INBOX
  allowed_domains:
    - example.com

logging:
  level: info
  format: text

🐳 Docker Deployment

docker pull ghcr.io/lsflk/raven:latest
docker run -d --rm \
  --name raven \
  -p 143:143 -p 993:993 -p 24:24 \
  -v $(pwd)/config:/etc/raven \
  -v $(pwd)/data:/app/data \
  -v $(pwd)/certs:/certs \
  -v $(pwd)/delivery.yaml:/app/delivery.yaml \
  ghcr.io/lsflk/raven:latest

⚠️ Breaking Changes

💾 Database Schema

The database architecture has been completely redesigned:

Old Format: Single mail.db database
New Format: Multi-database architecture
- shared.db - Global data
- user_db_*.db - Per-user databases
- role_db_*.db - Per-role databases

Action Required: Migration from v0.2.0 is not supported. Fresh installation required.

📦 Service Architecture

New three-service architecture:

IMAP Server (Ports 143, 993)
LMTP Delivery Service (Port 24)
SASL Authentication Service (Unix socket)

Action Required: Update Docker configuration to expose SASL socket if using Postfix SMTP authentication.

⚙️ Configuration Files

Configuration structure updated:

IMAP: raven.yaml
Delivery: delivery.yaml
Database path now points to directory, not file

Action Required: Update configuration files to new format.

🔧 Technical Details

Service Ports

Service	Port/Socket	Protocol	Description
IMAP	143	TCP	Unencrypted IMAP
IMAPS	993	TCP	TLS/SSL IMAP
LMTP	24	TCP	Mail delivery
LMTP	/var/run/raven/lmtp.sock	Unix Socket	Local delivery
SASL	/var/run/raven/sasl.sock	Unix Socket	Authentication

Database Files

File	Purpose	Tables
shared.db	Global data	domains, users, role_mailboxes, user_role_assignments
user_db_*.db	User mailboxes	mailboxes, messages, message_parts, headers, blobs, etc.
role_db_*.db	Role mailboxes	Same schema as user databases

IMAP Commands Support

All IMAP commands from v0.2.0 remain fully supported with enhanced reliability:

✅ CAPABILITY, LOGIN, AUTHENTICATE, STARTTLS
✅ LIST, LSUB, SUBSCRIBE, UNSUBSCRIBE
✅ CREATE, DELETE, RENAME
✅ SELECT, EXAMINE, STATUS
✅ FETCH, SEARCH, STORE, COPY
✅ UID, APPEND, CHECK, CLOSE, EXPUNGE
✅ NOOP, IDLE, NAMESPACE, UNSELECT

⚡ Performance Improvements

Reduced database lock contention with per-user databases
Faster mailbox operations with isolated storage
Improved concurrent user handling
Better memory efficiency with connection pooling
Optimized blob deduplication

🔐 Security Improvements

...

Assets 2

24 Oct 04:49

Aravinda-HWK

v0.2.0

39f0bc9

Raven MDA v0.2.0

📧 Release Notes - Raven Mail Server v0.2.0

📅 Release Date: October 24, 2025

🎯 Overview

This release represents a major milestone for Raven Mail Server, introducing a complete LMTP delivery service and comprehensive IMAP command support. The system now provides end-to-end email handling with both delivery and access capabilities.

✨ What's New

📬 LMTP Delivery Service

Complete email delivery implementation that receives incoming emails and stores them in the database:

LMTP Server Implementation - RFC 2033 compliant Local Mail Transfer Protocol server
- Unix socket support (/var/run/raven/lmtp.sock)
- TCP socket support (port 24)
- Multi-recipient delivery with per-recipient status responses
- Configurable message size limits and timeouts
Email Parser - Full MIME message parsing and storage
- Header preservation with sequence ordering
- Multipart message handling
- Attachment support via blob storage
- Message-ID generation
Storage Integration - Database operations for message delivery
- Multi-domain support with on-demand domain creation
- User and mailbox auto-provisioning
- Quota checking and enforcement
- Delivery tracking and logging
Postfix Integration - Seamless integration with MTA
- Direct LMTP transport configuration
- Virtual mailbox delivery support

🗄️ Database Architecture Migration

New unified database schema supporting both IMAP and delivery services:

Multi-domain and multi-user support
Normalized message storage with deduplication
Efficient header and MIME part storage
Mailbox message linking via junction table
Delivery tracking and audit logging
Outbound queue support for future SMTP functionality

📨 IMAP Command Implementations

Complete IMAP protocol support with comprehensive test coverage:

Mailbox Management
- LIST - List mailboxes with RFC 3501 wildcard pattern support (#44)
- LSUB - List subscribed mailboxes with hierarchy delimiters (#49)
- SUBSCRIBE / UNSUBSCRIBE - Subscription management (#41, #42)
- STATUS - Mailbox status retrieval (MESSAGES, RECENT, UNSEEN, etc.) (#50)
Message Operations
- FETCH - Retrieve message content, headers, and metadata (#69)
- SEARCH - Search messages with multiple criteria support (#68)
- STORE - Modify message flags (\Seen, \Flagged, \Deleted, etc.) (#70)
- COPY - Copy messages between mailboxes (#71)
- UID - UID-based operations for all applicable commands (#72)
- APPEND - Add new messages to mailboxes (#52)
Mailbox State Management
- CHECK - Checkpoint mailbox state (#65)
- CLOSE - Close selected mailbox and expunge deleted messages (#66)
- EXPUNGE - Permanently remove deleted messages (#67)

🧪 Testing & Quality

Comprehensive test suite for all IMAP commands
Helper functions for test setup and data creation
Unit tests for delivery service components
CI/CD workflow for automated testing
Test coverage for edge cases and error handling

📚 Documentation

Updated README with clear architecture overview (#79)
- System component descriptions (IMAP Server & Delivery Service)
- Email flow diagrams (receiving and reading)
- Configuration examples for both services
- Postfix integration guide
- Database structure documentation
Delivery Service Documentation
- Configuration file reference
- LMTP setup instructions
- Integration examples

🏗️ Infrastructure

Dockerfile Updates - Build and run both IMAP and delivery services
CI/CD Enhancements - Automated testing and build workflows
Configuration Management - Separate config files for IMAP and delivery

🐛 Bug Fixes

Fixed draft message not being saved to server (#76)

⚠️ Breaking Changes

💾 Database Schema

The database schema has been completely redesigned. Migration required for existing installations:

Old single-user database format is no longer supported
New multi-domain, multi-user architecture
Messages now stored with MIME structure

Action Required: This is not backward compatible. Fresh installation recommended.

⚙️ Configuration

IMAP server now requires raven.yaml configuration
Delivery service requires separate delivery.yaml configuration
Docker volume mounts updated to include delivery config

📝 Configuration Examples

IMAP Server (`raven.yaml`)

domain: example.com
auth_server_url: https://auth.example.com/verify

Delivery Service (`delivery.yaml`)

lmtp: unix_socket: /var/run/raven/lmtp.sock tcp_address: 127.0.0.1:24 max_size: 52428800 # 50MB database: path: data/mails.db

delivery: default_folder: INBOX allowed_domains: - example.com

🐳 Docker Deployment

docker pull ghcr.io/lsflk/raven:latest
docker run -d --rm \
  --name raven \
  -p 143:143 -p 993:993 -p 24:24 \
  -v $(pwd)/config:/etc/raven \
  -v $(pwd)/data:/app/data \
  -v $(pwd)/certs:/certs \
  -v $(pwd)/delivery.yaml:/app/delivery.yaml \
  ghcr.io/lsflk/raven:latest

🔧 Technical Details

IMAP Commands Support Matrix

Command	Status	RFC	Notes
CAPABILITY	✅	3501	Full support
LOGIN	✅	3501	With external auth
AUTHENTICATE	✅	3501	PLAIN mechanism
STARTTLS	✅	3501	TLS upgrade
LIST	✅	3501	Wildcard patterns
LSUB	✅	3501	Subscription filtering
SUBSCRIBE	✅	3501	Mailbox subscriptions
UNSUBSCRIBE	✅	3501	Remove subscriptions
CREATE	✅	3501	Mailbox creation
DELETE	✅	3501	Mailbox deletion
RENAME	✅	3501	Mailbox renaming
SELECT	✅	3501	Read-write selection
EXAMINE	✅	3501	Read-only selection
STATUS	✅	3501	All status items
FETCH	✅	3501	All fetch items
SEARCH	✅	3501	Multiple criteria
STORE	✅	3501	Flag management
COPY	✅	3501	Message copying
UID	✅	3501	UID operations
APPEND	✅	3501	Message upload
CHECK	✅	3501	Checkpoint
CLOSE	✅	3501	With expunge
EXPUNGE	✅	3501	Delete permanently
NOOP	✅	3501	Keep-alive
IDLE	✅	2177	Push notifications
NAMESPACE	✅	2342	Namespace support
UNSELECT	✅	3691	Close without expunge

⚡ Performance

SQLite database with optimized indexes
Efficient MIME part storage with blob support
Message deduplication via junction tables
Prepared statement caching

🔐 Security

TLS/SSL support (IMAPS on port 993)
STARTTLS for secure upgrade (port 143)
External authentication server integration
Domain-based access control
Quota enforcement to prevent abuse

🚧 Known Limitations

Single database file (SQLite) - not suitable for distributed deployments
No built-in SMTP server (relies on external MTA like Postfix)
Authentication requires external auth server

📦 Upgrade Instructions

From v0.1.0

Backup existing data (if applicable)
Pull latest image: docker pull ghcr.io/lsflk/raven:latest
Create delivery.yaml configuration file
Update docker run command with new volume mounts
Configure Postfix for LMTP delivery
Restart container

Note: Database migration from v0.1.0 is not supported. This release requires a fresh database.

💬 Support & Documentation

Repository: https://github.com/LSFLK/raven
Documentation: /docs/README.md
Issues: https://github.com/LSFLK/raven/issues

📊 Full Changelog: v0.1.0...v0.2.0

Assets 2

09 Oct 16:16

Aravinda-HWK

v0.1.0

54aa2e4

Raven MDA v0.1.0

🪶 Raven MDA – Release Notes

Version: v0.1.0
Release Date: 2025-10-09

✨ Overview

Raven is a lightweight Message Delivery Agent (MDA) and IMAP server written in Go.
This release introduces a unified IMAP command dispatcher, improved client handling,
and a cleaner modular structure for future extensibility.

🚀 New Features

Unified Client Command Handler (handleClient)
Routes all IMAP commands through a centralized switch, improving maintainability.
Supported IMAP Commands
Implemented core commands:

CAPABILITY, LOGIN, AUTHENTICATE, LIST, LSUB, CREATE, DELETE, RENAME, SELECT, EXAMINE, FETCH, SEARCH, STATUS, UID, IDLE, NAMESPACE, UNSELECT, APPEND, NOOP, LOGOUT, STARTTLS

Standardized Response System
Added sendResponse() for consistent and clear IMAP replies.

🛠️ Improvements

Safe Logging:
Message bodies and headers are now masked in logs for better security and readability.
Connection Stability:
Added a 30-minute read timeout to prevent idle connections from hanging indefinitely.
Error Handling:
Invalid or incomplete client commands now return standardized IMAP BAD responses.
Code Structure:
Command handlers split into separate methods for modularity and testing.

🧠 Technical Notes

Responses now comply more closely with RFC 3501 (IMAPv4rev1) format.
Logging enhanced with contextual information (Client: and Server: prefixes).
Ready for integration with Raven's SQLite storage layer for mail persistence.

🪶 About Raven

Raven is designed to be fast, modular, and storage-agnostic —
ideal for developers who want to integrate relational databases as mail storage backends.

Assets 2

Releases: LSFLK/raven

Raven MDA v0.6.0

Raven MDA v0.6.0

What's New

✨ New Features

Socketmap Service (migrated from Silver)

Group Email Support (LMTP)

Spam Restoration

🔧 Improvements

IDP Responsibility Refactoring

SASL Authentication Scope Configuration

🔒 Security

🐛 Bug Fixes

Breaking Changes

Docker

What's Changed

Contributors

Uh oh!

Raven MDA v0.5.0

Raven v0.5.0 Release Notes

🚀 Major Features

Advanced MIME Message Parser & Reconstruction

Docker & Deployment Enhancements

Consolidated Build Process

🧪 Testing & Quality Improvements

Comprehensive S3 Storage Testing

Enhanced MIME Parser Testing

🔒 Security & Code Quality

Security Hardening

Code Cleanup

🔧 Technical Improvements

Database Operations

Message Handling

Build & CI/CD

🐛 Bug Fixes

📚 Documentation Updates

🔄 Migration Notes

Breaking Changes

Docker Changes

Configuration

🎯 Performance Metrics

📦 Dependencies

🙏 Contributors

📝 Full Changelog

Features

Improvements

Bug Fixes

Refactoring

Documentation

Uh oh!

Raven MDA v0.4.0

Raven v0.4.0 Release Notes

🚀 Major Features

Global Blob Deduplication System

Enhanced Database Architecture

🧪 Testing & Quality Improvements

Comprehensive Test Coverage

Code Quality Enhancements

🔧 Technical Improvements

SASL Service Enhancement

Configuration & Deployment

Database Operations

🐛 Bug Fixes

📚 Documentation Updates

🔒 Security & Stability

📦 Dependencies

🔄 Migration Notes

Configuration Changes

🎯 Performance Metrics

🙏 Contributors

📝 Full Changelog

📞 Support

Uh oh!

Raven MDA v0.3.0

Raven Mail Server v0.3.0

🗄️ Multi-Database Architecture (#85)

👥 Role-Based Email System (#90)

🔐 SASL Authentication Service (#81)

🔒 Security Enhancements

GoSec Integration (#118, #127)