AutoIt
Force Quoted-Printable Encoding for Email

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

AutoIt
Local $bSuccess = False

$oEmail = ObjCreate("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.)
$oMailman = ObjCreate("Chilkat.MailMan")
ConsoleWrite($oMailman.RenderToMime($oEmail) & @CRLF)

;  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--

ConsoleWrite("----" & @CRLF)

;  To force quoted-printable, set the Content-Transfer-Encoding header.
;  It will automatically propagate as needed to the MIME sub-parts.
$oEmail.AddHeaderField "Content-Transfer-Encoding","quoted-printable"
ConsoleWrite($oMailman.RenderToMime($oEmail) & @CRLF)

;  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--