I'm using mutt & postfix on CentOS 6.2:
When I try to send mail to my company mailbox, I receive an error:
mutt -s "test" firstname.lastname@example.org < /home/mail.txt
Error from postfix:
<email@example.com>: host out1.example.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 ----- <firstname.lastname@example.org> (reason: 555 Syntax error) ----- Transcript of session follows ----- ... while talking to out1.example.com.: >>> MAIL From:<root@my_server> SIZE=667 <<< 555 Syntax error 554 5.0.0 Service unavailable**
I can make sure DNS is OK, and I set realname "root@myserver" in /etc/Muttrc
Any body can tell me why?