Dear All, I am trying to configure Virtual mailbox but having issue my squirrelmail is showing following error:-

ERROR: Connection dropped by IMAP server. Query: LSUB "" "*"

I have also check Thunderbird but having same issue. Please check my configuration and let me know any issue detected in it, Here is my configuration:-

# 2.0.0: /usr/local/dovecot/etc/dovecot/dovecot.conf # OS: Linux 2.6.26-2-686 i686 Debian 5.0.5 mail_location = maildir:~/Maildir mail_plugins = quota acl virtual

namespace { inbox = yes location = prefix = separator = . type = private } namespace { list = children location = maildir:/var/mail/public prefix = Public. separator = . subscriptions = no type = public } namespace { location = virtual:~/Maildir/.virtual:LAYOUT=maildir++ prefix = virtual. separator = . }

plugin { acl = vfile:/usr/local/dovecot/dovecot-acl/acl }

After doing all configuration i created the following dir under .virtual dir.

/home/domain/user/Maildir/.virtual/.Unseen /home/domain/user/Maildir/.virtual/.Unseen/ here created dovecot-virtual file with following text ..

INBOX Unseen

Restarted and set proper permission on all created directories then tried to login to client and getting the follwoing error in log file ..

Sep 09 13:02:47 imap-login: Info: Login: user=<piyush>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=3505, secured Sep 09 13:02:48 imap(piyush): Panic: file strfuncs.c: line 72 (p_strndup): assertion failed: (max_chars != (size_t)-1) Sep 09 13:02:48 imap(piyush): Error: Raw backtrace: /usr/local/dovecot/lib/dovecot/libdovecot.so.0 [0x9fefd9e1] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0 [0x9fefda5f] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(i_error+0) [0x9fefdd18] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0 [0x9ff1a2df] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(t_strndup+0x30) [0x9ff1a310] -> /usr/local/dovecot/lib/dovecot/lib01_acl_plugin.so [0x9fd32747] -> /usr/local/dovecot/lib/dovecot/libdovecot-storage.so.0(mailbox_list_iter_next+0x12) [0x9ff559f2] -> dovecot/imap [0x8051deb] -> dovecot/imap(cmd_list_full+0x424) [0x8052d34] -> dovecot/imap(cmd_lsub+0x19) [0x8053129] -> dovecot/imap [0x805671c] -> dovecot/imap [0x80567b9] -> dovecot/imap(client_handle_input+0x2d) [0x805692d] -> dovecot/imap(client_input+0x5f) [0x805731f] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0xf5) [0x9ff0a275] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_run+0x30) [0x9ff09250] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(master_service_run+0x2a) [0x9fef672a] -> dovecot/imap(main+0x2b5) [0x805ff95] -> /lib/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0x9fd66455] -> dovecot/imap [0x804eac1] Sep 09 13:02:48 master: Error: service(imap): child 3505 killed with signal 6 (core dumps disabled)

Please let me know the issue ??