.net user registration mail problem

[muthukumar]

guys iam getting this error when i try to send mail to a user who's registering.

plz help

The server rejected one or more recipient addresses. The server response was: 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Runtime.InteropServices.COMException: The server rejected one or more recipient addresses. The server response was: 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[COMException (0x8004020f): The server rejected one or more recipient addresses. The server response was: 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
]

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
System.RuntimeType.InvokeDispMethod(String name, BindingFlags invokeAttr, Object target, Object[] args, Boolean[] byrefModifiers, Int32 culture, String[] namedParameters) +0
System.RuntimeType.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParameters) +473
System.Web.Mail.LateBoundAccessHelper.CallMethod(O bject obj, String methodName, Object[] args) +58

[HttpException (0x80004005): Could not access 'CDO.Message' object.]
System.Web.Mail.LateBoundAccessHelper.CallMethod(O bject obj, String methodName, Object[] args) +111
System.Web.Mail.CdoSysHelper.Send(MailMessage message) +1840
System.Web.Mail.SmtpMail.Send(MailMessage message) +150
southmatrimonial.ValidateRegistration.SendMail(Str ing ProfileId, String ProfileName, String ProfileEmail, String ProfilePass, String MailMessage, String MailSubject) in C:\Inetpub\wwwroot\southmatrimonial\ValidateRegist ration.aspx.vb:255
southmatrimonial.ValidateRegistration.btnAccept_Cl ick(Object sender, EventArgs e) in C:\Inetpub\wwwroot\southmatrimonial\ValidateRegist ration.aspx.vb:197
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108
System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEventHandler.RaisePostBackEvent(String eventArgument) +57
System.Web.UI.Page.RaisePostBackEvent(IPostBackEve ntHandler sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCol lection postData) +33
System.Web.UI.Page.ProcessRequestMain() +1277




--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573

[Brangwyn]

Are you using a from address thats hosted by Vortech ? .. you should also be using "localhost" for the mailserver if you aren't already.

[muthukumar]

thanx brangwyn, i had changed it localhost :-)

[Brangwyn]