v0.2.1

Changelog

• 7ac2eaa Implement forwarding and message submission features
• 3a84ec6 Refactor code structure for improved readability and maintainability
• c6d71b9 Refactor code structure for improved readability and maintainability
• fbe0dd4 Refactor sending state management in core API
• efda9d4 chore(release): automate the ritual around goreleaser (#4)
• 84a8cda feat: add batch processing for spam training commands, allowing multiple message IDs in a single call
• f59bd9a feat: add receive-only and subaddressing support for domain management
• 2daf453 feat: add retention policy support for accounts and mailboxes
• 84fd997 feat: enhance sendHold description and add receive_only enum value
• 4a9ba7e feat: sync the core contract and surface its new forwarding refusals