Register with specific e mail

I am searching for a plug-in which used for register with specific e mail account. With saying specific e mail, for example schools have their own e mail aspect like “[email protected]” this is special for one student. But people can register with other e mail aspect. To avoid it I want to choice the aspect. They will just write before the @ an it will automatically set to @metu.edu.tr aspect. Is there any plug-in for this job ?