We often send emails with RTF and Word document as attachments by EASendMail. We can use AddAttachment method to attach RTF and Word document to message very easily. But here we will discuss how to convert RTF or Word document to html file and send the html email to end users without attachments.
First of all, we need to use Word Object(Please make sure Microsoft Word is installed on your machine) to convert the RTF or Doc to html file, secondly we can use ImportMailEx method to import html and embedded pictures to the message. The following vbscript demonstrates how to convert *.rtf to html and send message out.
Const ConnectNormal = 0
Const ConnectSSLAuto = 1
Const ConnectSTARTTLS = 2
Const ConnectDirectSSL = 3
Const ConnectTryTLS = 4
On Error Resume Next
Dim oWordApp, oWordDocuments, oWordDoc, oConverters, oConverter
Dim source, target
source = "c:\document.rtf"
target = "c:\document.htm"
Err.Clear
Set oWordApp = CreateObject("Word.Application")
If Err.Number <> 0 Then
	WScript.Echo Err.Description
	WScript.Quit()
End If
oWordApp.Visible = False
Set oWordDocuments = oWordApp.Documents
Const wdFormatHTML = 8
Err.Clear
Set oWordDoc = oWordDocuments.Open( source )
If Err.Number <> 0 Then
	WScript.Echo Err.Description
	oWordApp.Quit()
	WScript.Quit()
End If
Err.Clear
oWordDoc.SaveAs target, wdFormatHTML     
oWordDoc.Close() 
oWordApp.Quit()
If Err.Number <> 0 Then
	WScript.Echo Err.Description
	WScript.Quit()
End If
Dim oSmtp
Set oSmtp = CreateObject("EASendMailObj.Mail")
' for evaluation usage, please use "TryIt" as the license code.
oSmtp.LicenseCode = "TryIt"
oSmtp.ServerAddr = "myserver"
' User and password for ESMTP authentication
oSmtp.UserName = "test@adminsystem.com"
oSmtp.Password = "test"
' ConnectTryTLS means if server supports SSL/TLS connection, SSL/TLS is used automatically
oSmtp.ConnectType = ConnectTryTLS
' If your server uses 587 port 
' oSmtp.ServerPort = 587
' If your server uses 465 port with SSL/TLS 
' oSmtp.ConnectType = ConnectSSLAuto 
' oSmtp.ServerPort = 465
' If your server uses 25/587 port with SSL/TLS 
' oSmtp.ConnectType = ConnectSSLAuto 
' oSmtp.ServerPort = 587
oSmtp.FromAddr = "test@mydomain.com"
oSmtp.AddRecipient "tester", "test@mydomain.com", 0
oSmtp.Subject = "Test"
oSmtp.BodyFormat = 1
If oSmtp.ImportMailEx(target) <> 0 Then
	WScript.Echo "import mail failed" 
	WScript.Quit()
End If
If oSmtp.SendMail() <> 0 Then
	WScript.Echo oSmtp.GetLastErrDescription()
Else
	WScript.Echo "Message delivered"
End If
    Note*: if you use Word Object in ASP/ASP.NET application, there are some issues with it, more detail, please refer to http://support.microsoft.com/kb/257757.
See Also
        Using EASendMail ActiveX Object
        Registration-free COM with Manifest File
        User Authentication and SSL Connection
        From, ReplyTo, Sender and Return-Path
        Digital Signature and Email Encryption - S/MIME
        DomainKeys Signature and DKIM Signature
        Send Email without SMTP server(DNS lookup)
        Work with EASendMail Service(Mail Queuing)
        Programming with Asynchronous Mode
        Programming with FastSender
        Mail vs. FastSender
        Bulk Email Sender Guidelines
        Process Bounced Email (Non-Delivery Report) and Email Tracking
        EASendMail ActiveX Object References
        EASendMail SMTP Component Samples