mj-group-direction.mjml

<mjml>
  <mj-body>
    <mj-section>
      <mj-group direction="rtl">
        <mj-column>
          <mj-text>
            <h2>Easy and quick</h2>
          </mj-text>
        </mj-column>
        <mj-column>
          <mj-text>
            <h2>Responsive</h2>
          </mj-text>
        </mj-column>
      </mj-group>
    </mj-section>
  </mj-body>
</mjml>