mail(), XP & 551 error

[:: e1 ::]

my webpage is hosted on WinXP server. Mail() function doesn't work. I keep getting 551 User not local error when trying to send email.

What can I do or ask my provider in order to fix this?

I have also tryed usind ini_set("SMTP","my.server.com") and sendmail_from but I keep getting the sam mesage

Please help!

[Crunk]

hmm strange l suggest you get hold of your host it seems like the problem is something that only they can fix

[The Chancer]

SMTP error 551 - Is a relay mail error - The host doesn't allow mail to be relayed, only sent to or from that domain...

[piersk]

Or it means that the mailbox that you are trying to send to doesn't exist.

[The Chancer]

I have had this error today actually, (quite bizarre) and it was the relay problem, but hey - you learn something new every day,

Cheers Piersk...