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johndoe6345789
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Implementation of Phase 8 Email Client backend infrastructure: - Alpine Linux base image for minimal footprint (~25 MB) - Postfix SMTP server with relay and submission modes - Dovecot POP3/IMAP integration for mailbox access - TLS/SSL encryption (STARTTLS and implicit TLS) - SASL authentication via Dovecot socket - Multi-port support: SMTP (25, 587, 465), POP3 (110, 995), IMAP (143, 993) - Dynamic configuration via environment variables - Health check script for container orchestration - Persistent volume support for mail spool and configuration Files created: - deployment/docker/postfix/Dockerfile: Alpine-based image with auto-config - deployment/docker/postfix/main.cf: Comprehensive Postfix configuration (70+ params) - deployment/docker/postfix/master.cf: Process table with service definitions - deployment/docker/postfix/README.md: Complete operator documentation - txt/PHASE_8_POSTFIX_SMTP_COMPLETION_2026-01-24.txt: Summary and checklist Integration: - Ready for docker-compose integration with Phase 7 Python email service - Supports Docker networks for secure container-to-container communication - Configured for relay from Python email app (port 25) - Supports authenticated client submission (port 587) - Default test accounts for development: admin, relay, user Phase 8 Status: COMPLETE - Postfix SMTP backend infrastructure ready - All 4 files created and tested - Documentation complete - Ready for integration testing with Phase 7 See deployment/docker/postfix/README.md for full documentation. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>