There are cases when it is physically impossible to affix the mezuzah on the inside of the doorpost itself for example a swinging door interferes with the placement of the mezuzah.
Front door mezuzah placement.
מ זו זו ת mezuzot is a piece of parchment called a klaf contained in a decorative case and inscribed with specific hebrew verses from the torah deuteronomy 6 4 9 and 11 13 21 these verses consist of the jewish prayer shema yisrael beginning with the phrase.
A mezuzah should be fixed to the doorpost of ever living space in the house not just the entrance door.
It should be affixed to the doorpost on the right hand side of a person entering the room.
It should be affixed to the inside upper third of the right side of the door frame also known as the doorpost.
Any room that has two doorposts and an overhead lintel requires a mezuzah so one should check with a rabbi.
In such a case the preferred approach would be to make a groove that is less than a handbreadth deep and place the mezuzah in the groove.
For doors inside your home it will be on the right when you enter into the room the same way the door opens.
As long as a door can be used as an entrance and exit a mezuzah should be affixed to the doorpost.
Hear o israel the lord is our god the lord is one.
For an entryway without a door consider the hierarchy of a room in daily life.
Bathrooms closets laundry room boiler room and so forth however do not require a mezuzah.
Position the mezuzah at an angle with the top of the mezuzah usually the part with the hebrew letter shin that looks like a hand with three fingers pointing inside the room or house.