Xbase++
Force Quoted-Printable Encoding for Email

Demonstrates how to force the quoted-printable encoding for email.
Chilkat Xbase++ Downloads

Xbase++
LOCAL nSuccess
LOCAL oEmail
LOCAL oMailman

nSuccess := 0

oEmail := CreateObject("Chilkat.Email")

oEmail:Subject := "test"
oEmail:From := "bob@example.com"
oEmail: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..
oEmail:AddPlainTextAlternativeBody("This is a test == Hello World!")
oEmail: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.)
oMailman := CreateObject("Chilkat.MailMan")
? oMailman:RenderToMime(oEmail)

//  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--

? "----"

//  To force quoted-printable, set the Content-Transfer-Encoding header.
//  It will automatically propagate as needed to the MIME sub-parts.
oEmail:AddHeaderField("Content-Transfer-Encoding", "quoted-printable")
? oMailman:RenderToMime(oEmail)

//  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--

oEmail:destroy()
oMailman:destroy()