Create a mailto: link
Add block - Utilities - Social - Contact
This uses the mailto: url scheme
The email obsfucation option will use javascript to hide the email address from bots
<xt:click2email email="" enable_obfuscating="true" />
The above example produces this code the code is unique for each email address
<script type="text/javascript">document.write("<n uers=\"znvygb:abobql`abg-n-rznvy.pbz\" pynff=\"kg_ohggba\">abobql`abg-n-rznvy.pbz</n>".replace( /`/g, "@" ).replace(/[a-zA-Z]/g, function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);}));</script>