mjml-default.mjml

<mjml>
  <mj-head>
    <mj-attributes>
      <mj-text font-family="-apple-system,BlinkMacSystemFont,'Segoe UI','Helvetica Neue',sans-serif" font-size="16px" color="#212121" font-weight="400" font-style="normal" />
    </mj-attributes>
  </mj-head>
  <mj-body>
    <mj-container>
      <mj-section>
        <mj-column>

          <mj-text>Lorem ipsum dolor sit amet, eu stet facer expetendis nec. Ea duo vivendum adipisci. Ludus legendos ei per, no fabulas placerat mandamus pro, dicat partem ad usu. Ne eos quot illud denique, sea ex porro idque elaboraret, te oblique consequat ius. Ad saepe docendi has, viris senserit nam at, autem populo phaedrum eos no. Omnis habeo aliquam eu mel. Ut quo malis delicatissimi.</mj-text>

        </mj-column>
      </mj-section>
    </mj-container>
  </mj-body>
</mjml>