Intermittent error - Tried to read a line. No data received.

Question

Intermittent error - Tried to read a line. No data received.

Hi all,

I'm getting the following error intermittently. It is able to connect now and again, however, in most instances it errors when calling "imap.UseBestLogin(_user, _password)" with "Tried to read a line. No data received. "

Any help would be very much appreciated

Private Const _server As String = "outlook.office365.com"
Private Const _user As String = "xxxxxx"
Private Const _password As String = "xxxxxxx"

ServicePointManager.SecurityProtocol = _
    SecurityProtocolType.Tls12

Using imap As New Imap
    Try
         imap.ConnectSSL(_server)                           
         imap.UseBestLogin(_user, _password)                

         imap.SelectInbox()                    

         'Find all unseen messages.
         Dim uids As List(Of Long) = imap.Search(Flag.Unseen)        

         lblOutput.Text = "Number of unseen messages is: " _
              + uids.Count.ToString

         For Each uid As Long In uids

             ' Download and parse each message.
             Dim email As IMail = New MailBuilder() _
                .CreateFromEml(imap.GetMessageByUID(uid))   

             ' Display email data, save attachments:
             ProcessMessage(email)  

         Next

         imap.Close(False)
    Catch ex As Exception
         lblOutput.Text = ex.ToString
    Finally
        imap.Dispose()
    End Try
End Using