Problem s mail() i Windows 2K

Zdraveite, Imam edin problem, koito ne moga da sboria... Do sega vinagi sum polzval razni 3rd party clasove za prashtane na mail prez SMTP, no naskoro reshih da se opitam da polzvam mail() funkciata na PHP. Za sujalenie, kakvoto i da pravia poluchavam edin i sushti warning: ------------------------------------------------------------------- Warning: mail(): SMTP server response: 451 See http://pobox.com/~djb/docs/smtplf.html. in C:\bla\bla\mail.php on line 42 ------------------------------------------------------------------- Rovih iz vsichki RFC's, svurzani sus SMTP i otkrih che error-code 451 oznachaval problem, nezavishesh ot men, nai-veroiatno SMTP servera ne funkcioniral v momenta, da sum probval pak sled izvestno vreme ;( V sushtoto vreme, kato opitam da pratia mail ot mail-clienta si, v moia sluchai The Bat, na koito mu e posochen sushtia SMTP server niamam nikakvi problemi - priema si maila. Niakoi sbluskval li se e s podoben problem? Shte sum blagodaren na vsiakakvi idei i preporuki! Pozdravi, Atanas Vasilev ENVIRONMENT: PHP 4.3.8 SAPI (php4apache2.dll) APACHE 2.0.50 WINDOWS 2000 Professional 5.00.2195 Service Pack 4 php.ini [mail function] ; For Win32 only. SMTP = mail.ultima-bg.com smtp_port = 25 ; For Win32 only. ;sendmail_from = me@example.com ;polzvam ini_set("sendmail_from", "me@example.com"); ;na baza script ; For Unix only. ;sendmail_path = phpinfo() Internal Sendmail Support for Windows enabled