Courier: relaying denied. HELP!!!

Privet vsem.
Pitaius' nastroit' courier.
Domain dlia mail activiroval. Otpravliaiu mail na probnij account i vot 4to govorit log:
May 31 11:41:43 www courieresmtpd: error,relay=::ffff:195.130.225.11,from=<watchsystem@tiscali.it>,to=<inf o@mail.watchsystem.it>: 513 Relaying denied.
May 31 11:41:43 www courieresmtpd: error,relay=::ffff:195.130.225.11,msg="502 ESMTP command error",cmd: DATA
May 31 11:43:07 www courierd: Waiting. shutdown time=Tue May 31 11:48:07 2005, wakeup time=Tue May 31 11:48:07 2005, queuedelivering=0, inprogress=0

Gde rit'?
Google ob etom practi4eski ni4ego ne znaet.
Zaranee blagodaren.
Tolik.