chore(main): release 3.0.0

[github-actions]

🤖 I have created a release beep boop

3.0.0 (2024-03-04)

This version of Postal introduces a number of larger changes. Please be sure to follow the upgrade guide when upgrading to Postal v3. Highlights include:

• Removal of RabbitMQ dependency
• Removal of cron and requeuer processes
• Improved logging
• Improved configuration
• Adds prometheus metric exporters for workers and SMTP servers
• Only accepted RFC-compliant end-of-DATA sequences (to avoid SMTP smuggling)

Features

• add health server and prometheus metrics to worker (a2eb70e)
• add option to delay starting processes until all migrations are run (1c5ff5a)
• add prometheus metrics to smtp server (2e7b36c)
• add prometheus metrics to worker (bea7450)
• more consistent logging (044058d)
• new background work process (dc8e895)
• new configuration system (and schema) (Add Konfig #2819) (0163ac3)
• only accept RFC-compliant End-of-DATA sequence (0140dc4)
• add "postal:update" task (b35eea6)
• add helm env var config exporter (8938988)
• include list-unsubscribe-post header in dkim signatures (e1bae60), closes #2789 #2788
• support for additional SMTP client options (0daa667)

Bug Fixes

• fixes potential issue if machine hostname cannot be determined (0fcf778)
• raise an error if MX lookup times out during sending (fadca88), closes #2833
• set correct component in health server log lines (a7a9a18)
• translate unicode domain names to Punycode for compatibility with DNS (Unicode DNS #2823) (be0df7b)
• remove user email verification (e05f0b3)
• unescape in URLs which are stored for tracking (1da1182), closes #2568 #907 #115
• update wording about tracking domain cnames (0d3eccb), closes #2808

Documentation

• add message_db.encoding to config docs (0c1f925)
• add new repo readme welcome image (afa1726)
• add quick contributing instructions (8d21adc)
• update SECURITY policy (cfc1c9b)
• update docs for how IP address allocation works (07eb152), closes #2209

Miscellaneous Chores

• upgrade bundler to 2.5.6 (1ae8ef6)
• upgrade rails to 7.0 and other dependencies (ecd09a2)
• upgrade ruby to 3.2.2 and nodejs to 20.x (72715fe)

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[github-actions]

🤖 Release is at https://github.com/postalserver/postal/releases/tag/3.0.0 🌻