Hi,

I am getting the following error message when trying to implement LDA Dovecot 1.2.9 with virtual users:

Sep 28 15:59:33 server1 postfix/pipe[3041]: 28BEC2400A1: to=msmith@example.com, relay=dovecot, delay=2361, delays=2361/0.01/0/0.03, dsn=4.3.0, status=deferred (temporary failure. Command output: /usr/lib/dovecot/deliver must not be both world-executable and setuid-root. This allows root exploits. See http://wiki.dovecot.org/LDA#multipleuids )

I do not know if I need to change the group to secmail. Currently, I have as follows

-rwsr-xr-x   1 root root 933796 2011-06-10 05:36 deliver

Can I change it to any other group apart from secmail? and what does it mean by world-executable? Sorry if I ask a silly question here but keen to learn more about linux.

Here is my dovecot.conf log_timestamp: %Y-%m-%d %H:%M:%S protocols: imap listen: *:143 ssl: no disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/lib/dovecot/imap-login verbose_proctitle: yes first_valid_uid: 106 last_valid_uid: 200 mail_privileged_group: mail mail_location: maildir:/home/vmail/%u/Maildir mbox_write_locks: fcntl dotlock mail_plugins: quota imap_quota imap_client_workarounds: outlook-idle delay-newmail netscape-eoh tb-extra-mailbox-sep lda: postmaster_address: postmaster@example.com mail_plugins: quota sendmail_path: /usr/lib/sendmail rejection_reason: Your message to <%t> was automatically rejected:%n%r auth default: mechanisms: plain login username_format: %Lu verbose: yes debug: yes debug_passwords: yes passdb: driver: pam passdb: driver: ldap args: /etc/dovecot/dovecot-ldap.conf userdb: driver: prefetch userdb: driver: passwd userdb: driver: static args: uid=106 gid=1010 home=/home/vmail/%u socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: mail master: path: /var/run/dovecot-auth-master mode: 432 user: vmail group: vmail plugin: quota: maildir quota_rule: *:storage=3GB quota_rule2: Trash:storage=20%% quota_rule3: Spam:storage=10%% quota_warning: storage=95%% /usr/local/bin/quota-warning.sh 95 quota_warning2: storage=80%% /usr/local/bin/quota-warning.sh 80

Here is my master.cf # delivery through dovecot dovecot   unix  -       n       n       -       -       pipe flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${recipient}

Any help would be greatly appreciated.

Thank you