Hi, it seems that replication fails if a new account gets mail before the user opens the mailbox for the first time and creates the seen-db At least in imap 2.3.0, in function do_seen r = seen_open(&m, user, 0, &seendb); changing 0 into 1 seems to help r = seen_open(&m, user, 1, &seendb); regards Wolfgang Hamann