B4X
Force Quoted-Printable Encoding for Email

Demonstrates how to force the quoted-printable encoding for email.
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B4X
Dim success As Boolean = False

Dim email As ChilkatEmail
email.Initialize

email.Subject = "test"
email.From = "bob@example.com"
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..
email.AddPlainTextAlternativeBody("This is a test == Hello World!")
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.)
Dim mailman As ChilkatMailMan
mailman.Initialize("mailman")
Log(mailman.RenderToMime(email))

'  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--

Log("----")

'  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")
Log(mailman.RenderToMime(email))

'  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--