(Classic ASP) Force Quoted-Printable Encoding for Email

Demonstrates how to force the quoted-printable encoding for email.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%


' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Email")
set email = Server.CreateObject("Chilkat.Email")

email.Subject = "test"
email.From = "bob@example.com"
success = email.AddTo("Mary","mary@example.com")

' Add plain-text and HTML alternative bodies.
' Include some "=" chars so we can see the quoted-printable encoding when used..
success = email.AddPlainTextAlternativeBody("This is a test == Hello World!")
success = email.AddHtmlAlternativeBody("<html><body>This is a test == Hello World!</body></html>")

' Examine the MIME of the email to see that it does not use quoted-printable.
' (If the email contained non-usascii chars, it would automatically use quoted-printable.)
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.MailMan")
set mailman = Server.CreateObject("Chilkat.MailMan")
Response.Write "<pre>" & Server.HTMLEncode( mailman.RenderToMime(email)) & "</pre>"

' Here is the MIME before forcing quoted-printable.
' Notice the Content-Transfer-Encoding is "7bit" (not "quoted-printable")

' MIME-Version: 1.0
' Date: Tue, 29 Sep 2020 12:26:52 -0500
' Message-ID: <CF274FC0A2F82B98A05B7507DF7DFB966A2C0EB8@CHILKATSLICE>
' Content-Type: multipart/alternative;
'  boundary="------------080901080902080000030208"
' X-Priority: 3 (Normal)
' Subject: test
' From: bob@example.com
' To: Mary <mary@example.com>
' 
' --------------080901080902080000030208
' Content-Transfer-Encoding: 7bit
' Content-Type: text/plain; charset=us-ascii; format=flowed
' 
' This is a test == Hello World!
' --------------080901080902080000030208
' Content-Transfer-Encoding: 7bit
' Content-Type: text/html; charset=us-ascii
' 
' <html><body>This is a test == Hello World!</body></html>
' --------------080901080902080000030208--

Response.Write "<pre>" & Server.HTMLEncode( "----") & "</pre>"

' To force quoted-printable, set the Content-Transfer-Encoding header.
' It will automatically propagate as needed to the MIME sub-parts.
email.AddHeaderField "Content-Transfer-Encoding","quoted-printable"
Response.Write "<pre>" & Server.HTMLEncode( mailman.RenderToMime(email)) & "</pre>"

' MIME-Version: 1.0
' Date: Tue, 29 Sep 2020 12:26:52 -0500
' Message-ID: <F36B276E3A720FE5111D15CE9142C8909E1F5AB9@CHILKATSLICE>
' Content-Type: multipart/alternative;
'  boundary="------------080901080902080000030208"
' X-Priority: 3 (Normal)
' Subject: test
' From: bob@example.com
' To: Mary <mary@example.com>
' 
' --------------080901080902080000030208
' Content-Transfer-Encoding: quoted-printable
' Content-Type: text/plain; charset=us-ascii; format=flowed
' 
' This is a test =3D=3D Hello World!
' --------------080901080902080000030208
' Content-Transfer-Encoding: quoted-printable
' Content-Type: text/html; charset=us-ascii
' 
' <html><body>This is a test =3D=3D Hello World!</body></html>
' --------------080901080902080000030208--

%>
</body>
</html>