failed to use mutt to send mail to company mailbox
- by Acewind
I'm using mutt&postfix on CentOS 6.2: 
mutt-1.5.20-2.20091214hg736b6a.el6_1.1.x86_64
postfix-2.6.6-2.2.el6_1.x86_64
When I try to send mail to my company mailbox, I receive an error:
mutt -s "test" [email protected] < /home/mail.txt 
error from postfix:
: host out1.ourcompany.com[10.30.17.100] said: 
555 Syntax error (in reply to MAIL FROM command)
Then I try to use service sendmail as SMTP server, but also failed:
**----- The following addresses had permanent fatal errors -----
    (reason: 555 Syntax error)
   ----- Transcript of session follows -----
... while talking to out1.ourcompany.com.:
  
    
      MAIL From: SIZE=667
      <<< 555 Syntax error
      554 5.0.0 Service unavailable**
    
  
Any body can tell me why? Thanks!!!!
I can make sure DNS is OK, and I set realname "root@myserver" in /etc/Muttrc