SMTP listener corrupting HTML

[LogicMechanic]

I have an SMTP listener that accepts incoming connections and routes the message to a folder using FileStream. I have to add x-sender: [e-mail] and x-receiver: [e-mail] to the first two lines of the file so it can be put in a pickup folder for relay later. It seems as though this way of handling the incoming stream is corrupting the HTML in the email message body. Does anyone have a clue what I am doing wrong or a suggestion that would point me in the right direction regarding what I am missing?

[Plater]

This is all code you wrote yourself I am assuming?
Are you actually acting as a pop3 client or as an smtp server?
You should be able to look at whatever comes after the DATA line, up until you receive a . (period) on a line by itself.

[LogicMechanic]

I did not write the smtp, I canabalized some code. It is working nicely, listening on a port for incoming connections, responding well, and accepting the incoming byte stream of the message on a socket. When it gets to the MAIL command, I have to parse out the from and to email addresses to format the file for relaying. (I have to add x-sender: [e-mail] and x-receiver: [e-mail] to the first two lines of the file) It all seems to be working well except sometimes the HTML part of the message ends up with strange characters or a bunch of spaces (not &nbsp). I am wondering if the streamwriter or the byte array could be messing with the characters or if there is something i am not aware of. The only thing I could think was that each byte is in a format like ASCII or unicode or something like that and when it is output again the characters output as something different...but only sometimes.

I am sure you can tell I am new to this, so please bear with me and thank you for your help...

[Plater]

Hmm, I would certainly suspect that character encoding as a possibility.
Is the encoding type listed as a header or anything in the email?
Its probably coming in as unicode and the .net code defaults to ASCII
(or vice-versa)

[LogicMechanic]

Dim iBytes As Integer = ServerSocketForClient.Receive(byteArray, byteArray.Length, 0)
Dim MessageFromClient As String = Encoding.ASCII.GetString(byteArray)

This is what accepts the incoming stream. Do you have a better idea?

[Plater]

Well if there were non ascii characters in there, they would get mangled with that call I think.

Can you try using the UTF8 encoder instead and see what results you get?

[LogicMechanic]

I will try that. Is there anyway to preserve the binary stream without altering it in anyway?

[Plater]

Don't make the conversion to string on that byteArray variable.