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Duration 21 hours
Course Outline
Introduction to Stalwart
- Overview of Stalwart and the rationale behind its development
- Architecture of the single Rust binary
- Comparison against traditional mail stacks
- Licence details: AGPL-3.0 and Enterprise
Installation and Initial Setup
- System requirements and supported platforms
- Installation via Docker and Docker Compose
- Installing on Linux from the binary
- Selecting the database backend
- Bootstrap mode and the setup wizard
Core Protocols and DNS
- SMTP configuration for incoming and outgoing mail
- IMAP4 and JMAP for mail access
- POP3 support for legacy clients
- DNS records: MX, SPF, DKIM, DMARC
- Automated DKIM key rotation
Security and Authentication
- TLS with ACME certificate provisioning
- DANE and MTA-STS transport security
- Authentication backends: internal, LDAP, OIDC, SQL
- OAuth 2.0 and two-factor authentication
- Access control lists and permission settings
- Rate limiting and automated IP blocking
Spam and Phishing Protection
- Architecture of the built-in spam filter
- Classification using AI and Large Language Models
- Statistical Bayesian classifiers
- DNS blocklists and Pyzor
- Greylisting and spam traps
- Defences against phishing and homographic attacks
Storage and Search Backends
- Storage options: RocksDB, PostgreSQL, MySQL, SQLite
- Cloud blob storage via S3 and Azure
- Caching with Redis
- Full-text search: built-in vs external engines
Collaboration Services
- CalDAV and JMAP Calendars
- CardDAV and JMAP Contacts
- WebDAV file storage
- Sharing via ACLs and JMAP Sharing
Multi-Tenancy and User Management
- Domain and tenant isolation
- User accounts and group management
- Mailing lists and aliases
- Subaddressing and catch-all addresses
- Disk quotas per user and tenant
Administration and Monitoring
- WebUI dashboard and statistics
- CLI for scripting and automation
- SMTP queue management
- OpenTelemetry and Prometheus metrics
- Webhooks for event-driven automation
Clustering and High Availability
- Peer-to-peer cluster coordination
- Clustering using Kafka and Redis
- Read replicas and sharded storage
- Deployment on Kubernetes
- Fault tolerance design principles
Advanced Configuration
- The Sieve scripting language
- MTA hooks and milter integration
- Routing rules and virtual queues
- Envelope rewriting
Migration and Integration
- Migrating from Postfix and Dovecot
- Migrating from Exchange
- Autoconfig and Autodiscover
- Automated DNS management
- API-driven declarative deployments
Requirements
- Confidence working within the Linux command line
- A basic grasp of DNS concepts
- Knowledge of email fundamentals is beneficial but not essential
Audience
- System administrators
- DevOps and platform engineers
- IT infrastructure specialists
- Individuals managing or planning a self-hosted email deployment
Custom Corporate Training
Training solutions designed exclusively for businesses.
- Customised Content: We adapt the syllabus and practical exercises to the real goals and needs of your project.
- Flexible Schedule: Dates and times adapted to your team's agenda.
- Format: Online (live), In-company (at your offices), or Hybrid.
Price per private group, online live training, starting from £4800 + VAT*
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