Cyrus IMAP 2.4.3 Release Notes¶

Changes to the Cyrus IMAP Server since 2.4.2

Many fixes to replication edge case handling
Added missing flags to reconstruct
Replicate DELETED.user folders in sync_client -u (matches XFER behaviour now)
Make sync_client only connect after forking in rolling mode. Fixes two things - ssl crashes due to shared resource conflicts, and also means master will start up even if the replica is not contactable
Fixed crash on cyr_expire and ipurge annotation based expiry
Many XFER fixes for compatibility across versions:
allowing XFER in from delayed_expunge mailboxes
allowing XFER back all the way to Cyrus 2.2.12. This was accomplished by adding logic that can generate backwards-compatible older version indexes, and version detection from the imapd banner.
correctly fixing seen information for sub-mailboxes on XFER in
Multi-target replication. Strictly this is a new feature - there was a broken implementation in 2.4.0, which is how this snuck in to the bugfix release. It’s not super-well documented yet, but it works by creating a separate log file for each destination “channel”, and then running one sync_client process per channel, so replication can fall behind on one without affecting replication to the other.
Fixed some crashes and errors which occured when upgrading and opening corrupted mailboxes
Modified AFS ptloader configure options to allow building on more modern systems