Changelog 2.6.x

In 2.6.x, we focus on improving IMAP compatibility and expanding our automated test coverage.

Release Tags

• 2.6.0 (2025-09-25)

Highlights

• IMAP feature expansion (LSUB/SUBSCRIBE/UNSUBSCRIBE, improved APPEND + EXISTS signaling, robust header parsing) completed initial compatibility push.
• Large IMAP automated test harness established (command coverage + Mac Mail client simulation).

Added

• IMAP commands & helpers: LSUB, SUBSCRIBE, UNSUBSCRIBE, commandWithUntagged.
• Comprehensive IMAP test suites (LIST, FETCH, EXAMINE, SELECT, LOGIN/LOGOUT/AUTHENTICATE, CAPABILITY, NOOP) plus harness foundations.
• Special Thanks documentation page.

Changed / Refactored

• Moved IMAP implementation fully into monorepo structure.
• Extracted IP utility & improved cleanup script safety.

Fixed

• APPEND now triggers correct EXISTS update sequence.
• Removed unsupported QUOTE & MOVE commands to improve compatibility.
• Robust header parsing improvements; various test stabilization fixes.