Sending an email with text Content using SMTP Adapter.

Question

I am trying to send an email Message with the .txt attachment using SMTP adapter. I am getting an XML input and I am mapping the input Schema to Flat File Schema. I am trying to Send this Flat File(.txt attachment) in the Email. But I am receiving it as 
HTML format only.
The Expression in the Message Transform is,
     SMTPUtils.Part.SetContentType(OutgoingFlatFile_Msg.BodyFlatFile,"text");
     OutgoingFlatFile_Msg(SMTP.EmailBodyTextCharset)="UTF-8";
     DynamicEmailPort(Microsoft.XLANGs.BaseTypes.Address) = "mailto:[email protected]";
     OutgoingFlatFile_Msg(SMTP.CC) = "[email protected]";
     OutgoingFlatFile_Msg(SMTP.Subject) = "TESTMAIL";
     OutgoingFlatFile_Msg(SMTP.From) = "[email protected]";
     OutgoingFlatFile_Msg(SMTP.SMTPHost) = "smtp.org";
     OutgoingFlatFile_Msg(SMTP.SMTPAuthenticate) = 0;
The Email attachment is HTML format,
<?xml version="1.0" encoding="utf-8"?><ns0:Root xmlns:ns0="http://SampleSMTPEmail.OutgoingFlatFile"><Record><CustomerID>Cus001</CustomerID><OrderID>Ord001</OrderID></Record></ns0:Root>
How to attach the .txt file to the email.

Answer 1

Have you tried the following steps:
Create the message (“msgEnvelope”) as a Multi-Part message, with the required message in the Message Body Part (“Attachment”)
Set the following properties of the Envelope Message:
msgEnvelope(SMTP.Subject) = <Email Subject>;
msgEnvelope(SMTP.From) = <Sender Email>;
msgEnvelope(SMTP.SMTPHost) = <Email Host name>";
// This is the default value
msgEnvelope(SMTP.SMTPAuthenticate) = 0;
// Set the message text included in the email
msgEnvelope(SMTP.EmailBodyText) = <Text in body of email>;
// Important - This is required if the EmailBodyText is set
msgEnvelope(SMTP.EmailBodyTextCharset) = "utf-8";
// A value of '1' means include Message Body Part as email attachment
msgEnvelope(SMTP.MessagePartsAttachments) = 1;
Set the following properties of the Message Body Part (“Attachment”):
// Important - Change this MIME type if not sending a Text file
msgEnvelope.Attachment(Microsoft.XLANGs.BaseTypes.ContentType) = "text/plain";
// Set the Filename of the attachment
msgEnvelope.Attachment(MIME.FileName) = <Physical name of the attachment>;
Set the following property on the Dynamic Send Port:
// We set the Email Address on the Port itself
Dynamic_Send_Port(Microsoft.XLANGs.BaseTypes.Address) = <recipient email address>;
http://biztalktalk.wordpress.com/2008/08/28/sending-attachments-through-a-dynamic-send-port/
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