建好的邮件服务器，怎么让外域也能通过邮件服务器收发邮件

46212635

# postconf -n
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
mail_owner = postfix
mailq_path = /usr/bin/mailq
manpage_directory = /usr/local/man
mydestination = $myhostname, $mydomain, localhost
mydomain = mycompany.com
myhostname = mail.mycompany.com
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = no
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
unknown_local_recipient_reject_code = 550

现在服务器端，telnet 25 可以给本地账户和外域邮箱（新浪，qq邮箱等）发邮件，本地用户也可以接收来自外域的邮件

服务器不在公司，托管在电信，我这边远程维护，但是现在怎么让公司用outlook通过服务器收发邮件呢？

是不是因为下面这几条限制了只允许本地域收发邮件呢？
mydestination = $myhostname, $mydomain, localhost
mydomain = mycompany.com
myhostname = mail.mycompany.com
myorigin = $mydomain

怎么用windows自带的邮件软件远程连接服务器收发邮件呢？

46212635

我QQ 46212635 求服务配置达人，求交流