Emails (one per line):

Result (FEditor):

Result (HTML):

Decode snippet (jQuery):

<script>$(document).ready(()=>{let t=t=>{for(var a,r="",e=parseInt(t.substr(0,2),16),l=2;l<t.length;l+=2)r+=String.fromCharCode(output=(char=parseInt(charInHex=t.substr(l,2),16))^e);return r};$("[data-email]").each((a,r)=>{$(r).attr("href","mailto:"+t($(r).attr("data-email"))),""==$(r).text()&&$(r).text(t($(r).attr("data-email")))})});</script>

Decode snippet (native):

<script>document.addEventListener("DOMContentLoaded",function(t){let e=t=>{for(var e="",r=parseInt(t.substr(0,2),16),a=2;a<t.length;a+=2)e+=String.fromCharCode(output=(char=parseInt(charInHex=t.substr(a,2),16))^r);return e};document.querySelectorAll("[data-email]").forEach(t=>{let r=e(t.getAttribute("data-email"));t.setAttribute("href","mailto:"+r),""==t.innerText&&(t.innerText=r)})});</script>