Does yahoo provide https access to their email service? http access is blocked in my office,but https works?

am able to access other services like gmal thru https, so was wondering weather yahoo has some means where i dont have to use proxy sites like vtunnel or pagemod for checking my yahoo mail account.

Does yahoo provide https access to their email service? http access is blocked in my office,but https works?
Just to sign in at Yahoo Mail offers https. The account is only http.