[Sysadmins] Postfix

[kopilo4ka на gmail.com]

> helo oasu3.nsrz.ru
> 250 oasu3.nsrz.ru
> mail from: ashen на oasu3.nsrz.ru
> 250 Ok
> rcpt to: ashen на oasu3.nsrz.ru
> 450 <oasu3.nsrz.ru>: Helo command rejected: Host not found

host oasu3.nsrz.ru?
/etc/resolv.conf?
chroot_update?