Does Google Schema support quoted-printable encoding?

Question

I'm trying to self-test my email schemas.

My mail is sent with:

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

The original script tag <script type="application/ld+json"> is rendered as <script type=3D"application/ld+json">, when I View Original the marked up email.

This fails the markup tester, but when I manually remove the 3D, it passes the test.

Q1 - Does Google support quoted-printable encoding?

Q2 - Why does the test fail?

Note: On a Rails application I use the Mandrill API to send the email.

Answer 1

1.) Yes, quoted-printable is supported.

2.) You're testing the markup after it had been encoded. You should decode the raw email, then test it.