You don't. Spam is the cost of business. You accept it because being over-protective of your email address means risking losing valuable email from legitimate c

You don't. Spam is the cost of business. You accept it because being over-protective of your email address means risking losing valuable email from legitimate correspondents. You want every click on your email address to work for legitimate senders, so that means you suffer illegitimate senders, too. By the way, twenty spam emails a day is a tiny amount. My email accounts see hundreds a day after no-duh filtering.