It IS how you encrypt the email. However in most cases, connecting to mail.xxx.com (that is your ISP mail host) the packets will travel from your home, across the "last mile" (cable/DSL/dialup whatever) - get into the ISP core, and directly to the mail server. It isn't likely anybody can snoop on that besides the ISP. I for one - would NOT transmit anything over a wide open POP3 session that I wouldn't want sitting on a table on the sidewalk outside my house. What happens if you tick the box for "use ssl"?