Wietse Venema:
> steve zeng:
> > Greetings!
> >
> > We switched from Exim 4.6.3 to postfix 2.3.3 as mail relay host on RHEL 5.
> > We start getting report that email are rejected. We did a telnet emulation
> > and found that postfix reject email header as below:
> >
> > MAIL FROM: "My Company Support" <supp...@mycompany.com>
>
> That is not valid syntax. See the SMTP protocol specification: RFC 5322.
You can fix SMTP syntax with the smtpd_command_filter feature:
/etc/postfix/main.cf:
smtpd_command_filter = pcre:/etc/postfix/command_filter
/etc/postfix/command_filter:
/^MAIL FROM:\s*"[^"]+"\s+(<.+)/ $1
But basically the sending app is badly broken.
Wietse
