Content-Type: multipart/mixed; boundary="------------test-boundary" Message-ID: MIME-Version: 1.0 Subject: Bad multipart/mixed This is a multi-part message in MIME format. --------------test-boundary Content-Type: application/pdf; name="test.pdf" Content-Disposition: attachment; filename="test.pdf" Content-Transfer-Encoding: base64 JVBERi0xLjQKJUR1bW15IFBERgolJUVPRgo= --------------test-boundary Content-Type: multipart/alternative; boundary="------------alt-boundary" --------------alt-boundary Content-Type: Text/Plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit This is malformed multipart/mixed with a nested multipart/alternative body. --------------alt-boundary Content-Type: text/HTML; charset=UTF-8 Content-Transfer-Encoding: 7bit

This is malformed multipart/mixed with a nested multipart/alternative body.

--------------alt-boundary-- --------------test-boundary--