Kant's philosophy does not allow for exceptions and some believe that this contracdicts common experience. I truly believe Kant's views on lying is to strict for any normal person to live with.
Sometimes you must tell a lie in order for the good of all. Example is if you know that providing the true would lead to the death of a person then a little lie is a good thing however it should not be a common pratice.
Sometimes you must tell a lie in order for the good of all. Example is if you know that providing the true would lead to the death of a person then a little lie is a good thing however it should not be a common pratice.