Yes; even if they step on the endline, it's called a foot fault and (depending how competitive-ness you are playing), the other team will serve and get a point for the server's mistake.
Anywhere behind the back line of the court.
Baseline
The server stands behind the back boundary line before serving the ball in volleyball.
The endline is the out of bounds line that can also be called the serving line. It is parallel with the net where as the side lines run perpendicular to the net.
Anywhere behind the back line of the court.
The volleyball court, from endline to endline is 60 feet (30 feet/side). The court is 30 feet wide.
Position 1 is considered "right back" (If you're standing at the net looking at the endline, the left third of the court behind the ten foot line).
In volleyball, the server is determined by the team that wins the coin toss at the beginning of the match. The player who is designated as the server must serve the ball from behind the back boundary line of the court.
The back court is the area of your team's court that is closest to the endline (serving line).
The endline is the boundry line in which each goal sits on.... the sideline are the lines that run across the side in which throw ins are used... the endline ends up witha goal kick or a corner
The term for when a server steps past the serving line in volleyball is a foot fault.
at the back of the court