Text 28, 71 rader
Skriven 2004-11-17 21:38:00 av Glenman (1:278/230)
Ärende: Re: problem sending comma
=================================


"Lenny Vaz" <lenny_vaz@hotmail.com> wrote in message
news:<Mccid.319$cx6.148@news.itd.umich.edu>...
> I'm having some problems creating a very simple pop3 client.  The only thing 
> this client is supposed to do is poll the pop3 server for new messages.  The 
> client will connect (which it does successfully), provide a username via the 
> USER command, provide a password via the PASS command, and retrieve 
> statistics via the STAT command.
> 
> My problem is this: when I try to send the USER command (followed by Chr(13) 
> + Chr(10) for a carriage return/line feed), or any command for that matter, 
> the pop3 server returns with "ERR unrecognized command".  I can't find 
> anything wrong with the commands that I am sending to the server, they are 
> in the format: USER theusername <line feed> <carriage return>
> 
> Here is the snippet of code, it's pretty simple:
> 
>         'stream for sending data to the server
>         Dim output As NetworkStream
> 
>         'objects for reading and writing to stream
>         Dim writer As BinaryWriter
>         Dim reader As BinaryReader
> 
>         'message to send to server
>         Dim message As String = ""
> 
>         Dim popclient As TcpClient
>         popclient = New TcpClient
>         popclient.Connect(gHost, gPort)
>         output = popclient.GetStream()
>         writer = New BinaryWriter(output)
>         reader = New BinaryReader(output)
>         statusbar.Text = "Connected to " & gHost & " on port " & gPort & "."
> 
>         <code that reads welcome text from server>
> 
>         Pause(1)
> 
>         statusbar.Text = "Verifying username and password..."
>         message = "USER " + gUsername + Chr(13) + Chr(10)
>         writer.Write(message)
> 
>         Pause(2)
> 
>         <code that reads response server>
> 
>         writer.Write(message)
>         statusbar.Text = message
>         Pause(1)
> 
>         <code that reads response from server>
> 
>         message = "STAT"
>         writer.Write(message)
> 
>         <code that reads response from server>
> 
> In summary, the pop3 server is responding with "-ERR unrecognized command" 
> for any command I send.  Any ideas?

If your conncting to a Unix box, and you probably are, try just
sending a line feed. The carriage return might not be necessary.
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