==== Required information ====
- iRedMail version (check /etc/iredmail-release): V0.9.4
- Linux/BSD distribution name and version: centos 6.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): ldap
- Web server (Apache or Nginx):apache
- Manage mail accounts with iRedAdmin-Pro? 50
- Related log if you're reporting an issue:
====
that's my problem , i can't find out what's wrong , my server auto sent email to other email from sender=<>

Jul 22 18:03:34 mail postfix/pickup[25556]: DDB5326207E: uid=2000 from=<>
Jul 22 18:03:34 mail postfix/qmgr[17173]: DDB5326207E: from=<>, size=2184, nrcpt=1 (queue active)
Jul 22 18:03:39 mail postfix/qmgr[17173]: 19B16262082: from=<>, size=2649, nrcpt=1 (queue active)
Jul 22 18:03:39 mail amavis[24887]: (24887-12) Passed CLEAN {RelayedInternal}, <> -> <mary.leons@airmenzies.com>, Message-ID: <dovecot-1469181814-795797-0@mail.gpc.tw>, mail_id: sN8a274TeJ0o, Hits: -9.9, size: 2184, queued_as: 19B16262082, 4192 ms

=====
postconf -n
#inet_protocols = ipv4
inet_protocols = ipv4
virtual_alias_domains =
myhostname = mail.gpc.tw
myorigin = mail.gpc.tw
allow_percent_hack = no
swap_bangpath = no
mydomain = gpc.tw
mydestination = $myhostname, localhost, localhost.localdomain, localhost.$myhostname
biff = no
inet_interfaces = all
mynetworks = 127.0.0.0/8, 211.22.7.0/24
mynetworks_style = host
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = yes
smtp_tls_security_level = may
smtp_tls_CAfile = $smtpd_tls_CAfile
smtp_tls_loglevel = 0
smtp_tls_note_starttls_offer = yes
smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated,check_sender_access pcre:/etc/postfix/sender_access.pcre
delay_warning_time = 0h
maximal_queue_lifetime = 4h
bounce_queue_lifetime = 4h
recipient_delimiter = +
proxy_read_maps = $canonical_maps $lmtp_generic_maps $local_recipient_maps $mydestination $mynetworks $recipient_bcc_maps $recipient_canonical_maps $relay_domains $relay_recipient_maps $relocated_maps $sender_bcc_maps $sender_canonical_maps $smtp_generic_maps $smtpd_sender_login_maps $transport_maps $virtual_alias_domains $virtual_alias_maps $virtual_mailbox_domains $virtual_mailbox_maps $smtpd_sender_restrictions
smtp_data_init_timeout = 240s
smtp_data_xfer_timeout = 600s
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, check_helo_access pcre:/etc/postfix/helo_access.pcre
queue_run_delay = 300s
minimal_backoff_time = 300s
maximal_backoff_time = 4000s
enable_original_recipient = no
disable_vrfy_command = yes
home_mailbox = Maildir/
allow_min_user = no
alias_maps = hash:/etc/postfix/aliases
alias_database = hash:/etc/postfix/aliases
message_size_limit = 0
mailbox_size_limit = 0
virtual_minimum_uid = 2000
virtual_uid_maps = static:2000
virtual_gid_maps = static:2000
virtual_mailbox_base = /var/vmail
transport_maps = proxy:ldap:/etc/postfix/ldap/transport_maps_user.cf, proxy:ldap:/etc/postfix/ldap/transport_maps_domain.cf
virtual_alias_maps = proxy:ldap:/etc/postfix/ldap/virtual_alias_maps.cf, proxy:ldap:/etc/postfix/ldap/virtual_group_maps.cf, proxy:ldap:/etc/postfix/ldap/virtual_group_members_maps.cf, proxy:ldap:/etc/postfix/ldap/catchall_maps.cf
virtual_mailbox_domains = proxy:ldap:/etc/postfix/ldap/virtual_mailbox_domains.cf
virtual_mailbox_maps = proxy:ldap:/etc/postfix/ldap/virtual_mailbox_maps.cf
sender_bcc_maps = proxy:ldap:/etc/postfix/ldap/sender_bcc_maps_user.cf, proxy:ldap:/etc/postfix/ldap/sender_bcc_maps_domain.cf
recipient_bcc_maps = proxy:ldap:/etc/postfix/ldap/recipient_bcc_maps_user.cf, proxy:ldap:/etc/postfix/ldap/recipient_bcc_maps_domain.cf
relay_domains = $mydestination, proxy:ldap:/etc/postfix/ldap/relay_domains.cf
smtpd_sender_login_maps = proxy:ldap:/etc/postfix/ldap/sender_login_maps.cf
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain =
broken_sasl_auth_clients = yes
smtpd_sasl_security_options = noanonymous
smtpd_tls_auth_only = yes
smtpd_recipient_restrictions = reject_unknown_recipient_domain, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unlisted_recipient, check_policy_service inet:127.0.0.1:7777, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_end_of_data_restrictions = check_policy_service inet:127.0.0.1:7777
smtpd_tls_security_level = may
smtpd_tls_loglevel = 0
smtpd_tls_key_file = /etc/pki/tls/private/iRedMail.key
smtpd_tls_cert_file = /etc/pki/tls/certs/iRedMail_CA.pem
smtpd_tls_CAfile = /etc/pki/tls/certs/iRedMail_CA.pem
tls_random_source = dev:/dev/urandom
mailbox_command = /usr/libexec/dovecot/deliver
virtual_transport = dovecot
dovecot_destination_recipient_limit = 1
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/dovecot-auth
content_filter = smtp-amavis:[127.0.0.1]:10024
smtp-amavis_destination_recipient_limit = 1
smtpd_tls_protocols = !SSLv2 !SSLv3
smtp_tls_protocols = !SSLv2 !SSLv3
lmtp_tls_protocols = !SSLv2 !SSLv3
smtpd_tls_mandatory_protocols = !SSLv2 !SSLv3
smtp_tls_mandatory_protocols = !SSLv2 !SSLv3
lmtp_tls_mandatory_protocols = !SSLv2 !SSLv3
smtpd_tls_exclude_ciphers = aNULL, eNULL, EXPORT, DES, RC4, MD5, PSK, aECDH, EDH-DSS-DES-CBC3-SHA, EDH-RSA-DES-CDC3-SHA, KRB5-DE5, CBC3-SHA
smtpd_tls_dh1024_param_file = /etc/pki/tls/dhparams.pem
header_checks = pcre:/etc/postfix/header_checks
body_checks = pcre:/etc/postfix/body_checks.pcre
[root@mail ~]# postconf -n
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
allow_min_user = no
allow_percent_hack = no
biff = no
body_checks = pcre:/etc/postfix/body_checks.pcre
bounce_queue_lifetime = 4h
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5
delay_warning_time = 0h
disable_vrfy_command = yes
dovecot_destination_recipient_limit = 1
enable_original_recipient = no
header_checks = pcre:/etc/postfix/header_checks
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
inet_protocols = ipv4
lmtp_tls_mandatory_protocols = !SSLv2 !SSLv3
lmtp_tls_protocols = !SSLv2 !SSLv3
mail_owner = postfix
mailbox_command = /usr/libexec/dovecot/deliver
mailbox_size_limit = 0
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
maximal_backoff_time = 4000s
maximal_queue_lifetime = 4h
message_size_limit = 0
minimal_backoff_time = 300s
mydestination = $myhostname, localhost, localhost.localdomain, localhost.$myhostname
mydomain = gpc.tw
myhostname = mail.gpc.tw
mynetworks = 127.0.0.0/8, 211.22.7.0/24
mynetworks_style = host
myorigin = mail.gpc.tw
newaliases_path = /usr/bin/newaliases.postfix
proxy_read_maps = $canonical_maps $lmtp_generic_maps $local_recipient_maps $mydestination $mynetworks $recipient_bcc_maps $recipient_canonical_maps $relay_domains $relay_recipient_maps $relocated_maps $sender_bcc_maps $sender_canonical_maps $smtp_generic_maps $smtpd_sender_login_maps $transport_maps $virtual_alias_domains $virtual_alias_maps $virtual_mailbox_domains $virtual_mailbox_maps $smtpd_sender_restrictions
queue_directory = /var/spool/postfix
queue_run_delay = 300s
readme_directory = /usr/share/doc/postfix-2.11.0/README_FILES
recipient_bcc_maps = proxy:ldap:/etc/postfix/ldap/recipient_bcc_maps_user.cf, proxy:ldap:/etc/postfix/ldap/recipient_bcc_maps_domain.cf
recipient_delimiter = +
relay_domains = $mydestination, proxy:ldap:/etc/postfix/ldap/relay_domains.cf
sample_directory = /usr/share/doc/postfix-2.11.0/samples
sender_bcc_maps = proxy:ldap:/etc/postfix/ldap/sender_bcc_maps_user.cf, proxy:ldap:/etc/postfix/ldap/sender_bcc_maps_domain.cf
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp-amavis_destination_recipient_limit = 1
smtp_data_init_timeout = 240s
smtp_data_xfer_timeout = 600s
smtp_tls_CAfile = $smtpd_tls_CAfile
smtp_tls_loglevel = 0
smtp_tls_mandatory_protocols = !SSLv2 !SSLv3
smtp_tls_note_starttls_offer = yes
smtp_tls_protocols = !SSLv2 !SSLv3
smtp_tls_security_level = may
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_end_of_data_restrictions = check_policy_service inet:127.0.0.1:7777
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, check_helo_access pcre:/etc/postfix/helo_access.pcre
smtpd_recipient_restrictions = reject_unknown_recipient_domain, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unlisted_recipient, check_policy_service inet:127.0.0.1:7777, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain =
smtpd_sasl_path = private/dovecot-auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:ldap:/etc/postfix/ldap/sender_login_maps.cf
smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated,check_sender_access pcre:/etc/postfix/sender_access.pcre
smtpd_tls_CAfile = /etc/pki/tls/certs/iRedMail_CA.pem
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/pki/tls/certs/iRedMail_CA.pem
smtpd_tls_dh1024_param_file = /etc/pki/tls/dhparams.pem
smtpd_tls_exclude_ciphers = aNULL, eNULL, EXPORT, DES, RC4, MD5, PSK, aECDH, EDH-DSS-DES-CBC3-SHA, EDH-RSA-DES-CDC3-SHA, KRB5-DE5, CBC3-SHA
smtpd_tls_key_file = /etc/pki/tls/private/iRedMail.key
smtpd_tls_loglevel = 0
smtpd_tls_mandatory_protocols = !SSLv2 !SSLv3
smtpd_tls_protocols = !SSLv2 !SSLv3
smtpd_tls_security_level = may
swap_bangpath = no
tls_random_source = dev:/dev/urandom
transport_maps = proxy:ldap:/etc/postfix/ldap/transport_maps_user.cf, proxy:ldap:/etc/postfix/ldap/transport_maps_domain.cf
unknown_local_recipient_reject_code = 550
virtual_alias_domains =
virtual_alias_maps = proxy:ldap:/etc/postfix/ldap/virtual_alias_maps.cf, proxy:ldap:/etc/postfix/ldap/virtual_group_maps.cf, proxy:ldap:/etc/postfix/ldap/virtual_group_members_maps.cf, proxy:ldap:/etc/postfix/ldap/catchall_maps.cf
virtual_gid_maps = static:2000
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = proxy:ldap:/etc/postfix/ldap/virtual_mailbox_domains.cf
virtual_mailbox_maps = proxy:ldap:/etc/postfix/ldap/virtual_mailbox_maps.cf
virtual_minimum_uid = 2000
virtual_transport = dovecot
virtual_uid_maps = static:2000
====================================

i try to fix this problem , but i tried for few days , please help me , thanks