主题: 外网能发不能收，内网收发正常。跪求解决方案
大概架构如下：
域名是在中资源申请的域名，A/MX记录已经在中资源做过解析，解析正常。ping域名及返回的IP均正常
内部e-mail server 映射到公网IP。在路由器上开放25，80，110端口。telnet *.*.*.* 25/110均 正常。
服务器是用ubuntu 10.04 64位操作系统，安装了iredmail。下面是简单配置，请各位大侠给予帮助，
小弟已经研究几天了，快崩溃列。主要问题是：对外网能发不能收，内网收发正常，先谢谢各位了。
主机名：
cynovo@mail:~$ hostname -f
mail.cynovo.com.cn
mian.cf 配置：
cynovo@mail:~$ sudo postconf -n
[sudo] password for cynovo:
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
allow_min_user = no
append_dot_mydomain = no
biff = no
bounce_queue_lifetime = 1d
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
delay_warning_time = 0h
disable_vrfy_command = yes
enable_original_recipient = no
home_mailbox = Maildir/
inet_interfaces = all
inet_protocols = ipv4
mail_name = iRedMail
mail_version = 0.6.1
mailbox_command = /usr/lib/dovecot/deliver
mailbox_size_limit = 15728640
maximal_backoff_time = 4000s
maximal_queue_lifetime = 1d
minimal_backoff_time = 300s
mydestination = cynovo.com.cn, mail.cynovo.com.cn, localhost.cynovo.com.cn, localhost
mydomain = cynovo.com.cn
myhostname = mail.cynovo.com.cn
mynetworks = 127.0.0.0/8 192.168.1.0/24
mynetworks_style = subnet
myorigin = mail.cynovo.com.cn
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
queue_run_delay = 300s
readme_directory = no
recipient_bcc_maps = proxy:ldap:/etc/postfix/ldap_recipient_bcc_maps_domain.cf, proxy:ldap:/etc/postfix/ldap_recipient_bcc_maps_user.cf
recipient_delimiter = +
relay_domains = $mydestination, proxy:ldap:/etc/postfix/ldap_relay_domains.cf
relayhost =
sender_bcc_maps = proxy:ldap:/etc/postfix/ldap_sender_bcc_maps_domain.cf, proxy:ldap:/etc/postfix/ldap_sender_bcc_maps_user.cf
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_enforce_tls = no
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks,permit_sasl_authenticated, check_helo_access pcre:/etc/postfix/helo_access.pcre
smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unlisted_recipient, check_policy_service inet:127.0.0.1:7777, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, check_policy_service inet:127.0.0.1:10031
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = no
smtpd_sasl_local_domain =
smtpd_sasl_path = dovecot-auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:ldap:/etc/postfix/ldap_sender_login_maps.cf
smtpd_sender_restrictions = permit_mynetworks, reject_sender_login_mismatch, permit_sasl_authenticated
smtpd_tls_cert_file = /etc/ssl/certs/iRedMail_CA.pem
smtpd_tls_key_file = /etc/ssl/private/iRedMail.key
smtpd_tls_loglevel = 0
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
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
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_sender_login_maps.cf, proxy:ldap:/etc/postfix/ldap_catch_all_maps.cf
virtual_gid_maps = static:1001
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 = 1001
virtual_transport = dovecot
virtual_uid_maps = static:1001
cynovo@mail:~$
mail.log没有任何数据
cynovo@mail:~$ sudo tail /var/log/mail.log
cynovo@mail:~$
dovecot.log 为：
cynovo@mail:~$ sudo tail /var/log/dovecot.log
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: Effective uid=1001, gid=1001, home=/var/vmail
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: Quota root: name= backend=maildir args=
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: Quota rule: root= mailbox=* bytes=104857600 messages=0
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: Quota warning: bytes=89128960 (85%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 85
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: Quota warning: bytes=94371840 (90%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 90
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: Quota warning: bytes=99614720 (95%) messages=0 command=/usr/local/bin/dovecot-quota-warning.sh 95
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: maildir: data=~/vmail1/cynovo.com.cn/w/ww/www/www-2010.11.29.12.25.48//Maildir/
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: maildir++: root=/var/vmail/vmail1/cynovo.com.cn/w/ww/www/www-2010.11.29.12.25.48//Maildir, index=, control=, inbox=/var/vmail/vmail1/cynovo.com.cn/w/ww/www/www-2010.11.29.12.25.48//Maildir
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: Namespace : Using permissions from /var/vmail/vmail1/cynovo.com.cn/w/ww/www/www-2010.11.29.12.25.48//Maildir: mode=0700 gid=-1
Nov 30 12:34:04 IMAP(www@cynovo.com.cn): Info: Disconnected: Logged out bytes=254/2422
cynovo@mail:~$
弱弱问下：我没有配置SPF和DKIM记录。不知是否会有影响？
这边映射的公网IP是否需要ISP提供商做反解析？
谢谢各位大侠了、、在线等。。。