Bullet proof servers refer to the special services which are offered by some of the web hosting servers. Under this the user has the ease to send bulk mail and can distribute all kinds of materials to the target clients. It is apt for people who want to send bulk mails without worrying about their account being disconnected. But in order to enjoy this service you need to buy an account in the bullet proof servers. It would help you to get good amount of disk space and bandwidth. If anyone complaints against your website for sending bulk mails then also you need not worry as the bullet proof server would not take any action against you.
This kind of service is especially popular with people who rely upon email marketing and use it for reaching out to the target clients. Most of the other server do not allow you to send bulk mail and may restrict it to a certain number. However if you opt for bullet proof server then you can send in multiple bulk mails without worrying about such limitations. This kin of server can be rented for certain and during that time you can use the bulk email marketing service and enjoy the benefits offered by the server.