In CSS it is not possible. after
is a pseudo element and therefore not part of the actual DOM.
However, since your question is tagged with jQuery as well, why not just append the email to your div
?
$(document).ready(function(){
$(".SPA-notRight").append('Contact us: <a href="mailto:me@email.com">me@email.com</a>');
});
Demo:
$(document).ready(function(){
$(".SPA-notRight").append('Contact us: <a href="mailto:me@email.com">me@email.com</a>');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="SPA-notRight">
<p>Something not right?</p>
</div>