JMail script der driller

Jeg er på Herrens mark... Jeg har nedenstående script som ikke kan udsende mit nyhedsbrev. Kan nogen her identificere om der er fejl i scriptet?

Min webudbyder (Buydomains) giver mig denne fejl når jeg forsøger at sende:

jmail.SMTPMail error '8000ffff'
The message was undeliverable. All servers failed to receive the message


----Her er scriptet ----------


<%
Response.charset="iso-8859-1"
'Session.LCID=1030
DBSti = "DBQ=" & Server.Mappath("mindatabase.mdb")

Server.ScriptTimeout=6000

Response.buffer=true

if request("mode") = "send" then



Set DB = Server.CreateObject("ADODB.Connection")
DB.Open "DRIVER={Microsoft Access Driver (*.mdb)}; " & DBSti
if request.querystring("id") = "" then intcompanyID = 0
set RS = Server.CreateObject("adodb.Recordset")
SQL ="SELECT * FROM t_company WHERE (news_alm = 'on') ORDER BY companyID"
   

RS.Open SQL, DB, 3
TotalCount = RS.Recordcount

if TotalCount > 1 then Response.flush

Do While Not RS.EOF
if rs("e_mail") <> "" then
    Set JMail = Server.CreateObject("JMail.SMTPMail")
JMail.ServerAddress = "smtpgateway.navneservice.com"
    JMail.Sender        = "minmail@minadresse.dk"
    JMail.Priority      = 3
    JMail.Charset = "iso-8859-1"
    JMail.ContentTransferEncoding = "8bit"
    JMail.ContentType = "text/html"
    JMail.Subject = request("header")
    JMail.AddRecipient rs("e_mail")
    JMail.Body = request("tekst")
JMail.Execute
   
    %>
    Sender Mail til : <%=rs("m_fornavn")%> - <%=rs("e_mail")%><br>
    <%
'    SQL2 = "UPDATE t_company SET newsmailsent = 1 WHERE companyID = " & rs("companyid") & ""
'    DB.execute(SQL2)
end if
    RS.MoveNext
    Response.flush
  Loop
DB.close



else
%>
<CENTER>
<TABLE BORDER="0">
<form action="nyhedsbrevsendes.asp" METHOD="POST">
<INPUT TYPE="hidden" NAME="mode" VALUE="send">
  <TR>
    <TD ALIGN="LEFT">
    <FONT FACE="Arial" SIZE="2" COLOR="#000000"><STRONG>
    Overskrift:&nbsp;
    </STRONG></FONT>
    </TD>
    <TD ALIGN="LEFT">
    <INPUT TYPE="TEXT" NAME="header" SIZE="50" value="Fast titel på mit nyhedsbrev">
    </TD>
  </TR>
  <TR>
    <TD ALIGN="RIGHT" VALIGN="TOP">
    <FONT FACE="Arial" SIZE="2" COLOR="#000000"><STRONG>
    Tekst:&nbsp;
    </STRONG></FONT>
    </TD>
    <TD ALIGN="LEFT">
    <TEXTAREA COLS="45" ROWS="15" NAME="tekst"></TEXTAREA>
    </TD>
  </TR>
  <TR>
    <TD ALIGN="LEFT">&nbsp;
   
    </TD>
    <TD ALIGN="RIGHT">
        <input type="submit" value="-- SEND --">
    </TD>
  </TR>
</FORM>
</TABLE>
</CENTER>
<%
end if
%>