1.0SparkToro Supporthttps://sparktoro.com/supportCasey Henryhttps://sparktoro.com/support/author/casey/rich600338<blockquote class="wp-embedded-content" data-secret="sRwROVSdf1"><a href="https://sparktoro.com/support/email-lists-sparktoro/">How does SparkToro handle uploaded email lists?</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://sparktoro.com/support/email-lists-sparktoro/embed/#?secret=sRwROVSdf1" width="600" height="338" title="“How does SparkToro handle uploaded email lists?” — SparkToro Support" data-secret="sRwROVSdf1" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://sparktoro.com/support/wp-includes/js/wp-embed.min.js /* ]]> */ </script> When you upload a list of email addresses to SparkToro, the file is processed entirely in memory for real-time matching. We compare the emails in your list to publicly available profiles from our data partners so we can build an aggregated audience and generate the insights you see in your final report. At no point