! Pleased you joined us! Not sure what you man by send mail. To respond to a post from someone else you click the blue 'post a reply' tab at the bottom of their message and the blue 'submit' button at the bottom of what you typed to them. To send a private message you go to the person's user name with your cursor and click when you see 'send a private message.' Hope this helps with your questions!! Happy you're here!