sending mail (Ms outlook)

[vijy]

hi all,
Am attending to send a mail to the user if the PST file size crossed 100 mb,
now i got error in the string user.i stored the user mail id in a string and tried to use it, but am facing some problem
ERROR i s DOMAIN NAME REQUIRED FOR SENDER ADDRESS..
Can anybody solve this..

Private Sub Command1_Click()


Dim siz As New FileSystemObject
Dim fil As File
Dim fldr As Folder
Dim mb As Long
Dim user As String

user = Outlook.Session.CurrentUser.Address

Set fil = siz.GetFile("D:\VijayMails\Outlook1.pst")

mb = (fil.Size / 1024) / 1024

 
 
 If mb > 100 Then
   Call SendMailUsing("user", "user", "test", "test", "")
   Else
   MsgBox "PST File Size doesn't exceed the range"
 End If
End Sub

Private Sub Form_Load()
Command1.Caption = "Click ME "
End Sub
Private Sub SendMailUsing(mailto As String, mailfrom As String, mailmessage As String, mailbody As String, mailAttachmentFilename As String)
Dim objMessage

On Error GoTo err:
    Set objMessage = New CDO.Message
    Dim a As New CDO.Message
    objMessage.Subject = "Test Message"
    objMessage.From = mailfrom  'mail from "[email protected]
    objMessage.To = mailto  'mail to [email protected]
    objMessage.TextBody = mailbody
    objMessage.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
    objMessage.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserver") = "192.168.1.10"
    objMessage.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25
    objMessage.Configuration.Fields.Update
    'objMessage.AddAttachment mailAttachmentFilename
    objMessage.Send
    Set objMessage = Nothing
    MsgBox "Email Sent!"
     Exit Sub

err:
    MsgBox "Error!" & vbNewLine & err.Description
    Exit Sub
End Sub