What does a sample MIME message look like?

Here is an example of a MIME encoded message without an attachment:

MIME-Version: 1.0
 X-Mailer: MailBee.NET 8.0.4.428
 Subject: This is the subject of a sample message
 To: user@example.com
 Content-Type: multipart/alternative;
 boundary="XXXXboundary text"

--XXXXboundary text
 Content-Type: text/plain;
 charset="utf-8"
 Content-Transfer-Encoding: quoted-printable

This is the body text of a sample message.

--XXXXboundary text
 Content-Type: text/html;
 charset="utf-8"
 Content-Transfer-Encoding: quoted-printable

<pre>This is the body text of a sample message.</pre>
--XXXXboundary text--

Here is an example of a MIME encoded message with an attachment:

MIME-Version: 1.0
X-Mailer: MailBee.NET 8.0.4.428
Subject: test subject
To: kevinm@datamotion.com
Content-Type: multipart/mixed;
       boundary="XXXXboundary text"
 
--XXXXboundary text
Content-Type: multipart/alternative;
       boundary="XXXXboundary text"
 
--XXXXboundary text
Content-Type: text/plain;
       charset="utf-8"
Content-Transfer-Encoding: quoted-printable
 
This is the body text of a sample message.
--XXXXboundary text
Content-Type: text/html;
       charset="utf-8"
Content-Transfer-Encoding: quoted-printable
<pre>This is the body text of a sample message.</pre>

--XXXXboundary text
Content-Type: text/plain;
name="log_attachment.txt"
Content-Disposition: attachment;
filename="log_attachment.txt"
Content-Transfer-Encoding: base64
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--XXXXboundary text--
ENTER YOUR CODE HERE