I followed those steps: 1) shutdown imap daemon 2) rm /var/imap/db/* 3) rm /var/imap/tls_session.db and /var/imap/deliver.db 4) reconstruct -f (as cyrus user) 5) changed /usr/local/etc/imapd.conf in this manner: #tlscache_db: berkeley-nosync tlscache_db: skiplist #ptscache_db: berkeley ptscache_db: skiplist #duplicate_db: berkeley duplicate_db: skiplist 6) start imap daemon it seems quite stable. I hope it is solved. Thank you all for support! ---- 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