chore(main-modalsource): release 3.6.0

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3.6.0 (2026-02-04)

Features

• add POSTAL_BATCH_QUEUED_MESSAGES_LIMIT environment variable for batch size configuration (8c5bc6f)
• add throttled domains management interface and functionality (7fa76e9)
• add throttled domains management interface and functionality (e68834d)
• add throttled domains management interface and functionality (65cf002)
• Automatic IP Blacklist Management & Reputation System (#61) (896ae5c)
• Domain Throttling: Exclude messages that contain an IP address (these are typically IP-specific blocks, not domain throttling) (7d3b288)
• enhance SMTP logging for connection and message sending (e03a5c5)
• implement domain throttling for SMTP rate limiting (7b4d3f2)
• implement Phase 1 & 2 of MX-based rate limiting system (b20fe60)
• reallocates IP address for the retry after a softfail (a04c7e7)

Bug Fixes

• correct schema version format to use integer without underscores (4746d41)
• update domain throttles migration to use Rails 7.1 (c73c970)
• update schema.rb with domain_throttles table (d53ef8f)

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