rustmailer

1.6.0 – 2026-03-05

✨ Major Features

Microsoft Graph API support

RustMailer now supports integration with Microsoft Graph, enabling Outlook / Microsoft 365 mailboxes to work alongside IMAP and Gmail accounts.

Key capabilities include:

• Email synchronization via Graph API
• Send, reply, and forward emails
• Fetch threads and thread messages
• Move, copy, and delete messages
• Attachment download support
• Draft creation and reply-all support
• Mailbox management (create / delete / update)

---

🏷 Unified message tagging

Introduced a new unified tagging API:

• /tag-messages endpoint for setting labels / categories / keywords
• Works across IMAP, Gmail, and Graph accounts
• Added gRPC support for tag_messages

---

🔧 Improvements

• Improved Graph folder normalization (Inbox, Sent, Drafts)
• More robust handling of missing Graph API scopes
• Compact MailList UI for higher message density
• New /disk-cache endpoint to manually clear disk cache

---

🐛 Fixes

• Fixed resync behavior for empty accounts
• Prevent message from being marked as read when creating reply drafts
• Improved Graph API error handling and logging
• Docker healthcheck improvements

Full Changelog: https://github.com/rustmailer/rustmailer/compare/1.5.3...1.6.0