Most providers support it afaik. Additionally, gmail normalize all periods (.) to the mail address without periods. So your.name@gmail.com yo.u.r.n.a..m.e@gma

Most providers support it afaik. Additionally, gmail normalize all periods (.) to the mail address without periods. So your.name@gmail.com yo.u.r.n.a..m.e@gmail.com both get delivered to yourname@gmail.com