Hello, I am using Cyrus IMAP 2.5 with Kolab 3.4 on CentOS7. But I think this problem is not related to Kolab, so I am posting on this mailing list. I have a reproducable problem when connecting to a mailbox from Thunderbird through IMAP for the first time, that some messages get expunged and all emails are set to unread. If I run reconstruct again on the mailbox, the expunged emails are restored. in the log file I see: Expunged 63 messages from mydomain.de!user.myuser Repacking mailbox mydomain.de!user.myuser version 10 I have no idea what this means. Any ideas? I am also wondering if the seen state is still stored in /var/lib/imap/user/... myuser.seen, or actually in the cyrus.index file in /var/spool/imap? https://cyrusimap.org/mediawiki/index.php/Cyrus_2.4_Changes says: "User seen flag moved into cyrus.index, the most common case" but the myuser.seen file still gets updated, according to the file modification time Thank you for your help, Timotheus ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus