Handling mail to and from inmates is a challenge for jail administrators. Of course they want to enable inmates to handle their legitimate business (including pending legal matters) and maintain family and community ties. On the other hand, they must be on guard against contraband or inappropriate materials coming into the jail, or inmates participating in crimes or planning an escape from within. Inmates have a constitutional right to communicate with others and to access the courts, but those rights are limited by the jail’s obligation to preserve security, good order, and discipline. This post collects some of the basic legal principles that should be incorporated into the jail’s policy on mail regulation. By state administrative regulation, every jail must have a written policy on handling inmate mail.