Mailing Obscene Material is the act of sending pornographic or otherwise explicit material through the postal system or other delivery service. Such material could include photographs, drawings, writings, or other forms of media that depict or describe sexual activity, nudity, or extreme violence. It is illegal to mail obscene material in the United States and other countries. The different types of Mailing Obscene Material include: 1. Obscene Photographs: Sending photographs or images that depict nudity or sexual activity. 2. Obscene Writings: Sending written material that describes or depicts sexual activity, nudity, or extreme violence. 3. Obscene Videos: Sending recordings that contain explicit content, such as videos or films. 4. Obscene Objects: Sending objects that are considered obscene, such as sex toys or items of clothing.