Effective August 1, 2024, the Middlesex Sheriff’s Office will switch to a digital delivery system for personal mail for incarcerated individuals. The switch to digital mail applies only to personal and nonprivileged mail. Privileged and legal correspondence, as well as publications sent directly from a publisher or authorized retailer, will still be accepted through the postal service.
The program is run by Securus Technologies, which will receive, open, and scan mail into digital files. The original correspondence will be kept by Securus for 60 days before being destroyed. A sender may request their correspondence be returned by including a self-addressed and stamped envelope.
For more information, please click here: Mail Posters.
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Addressing Mail
Please make sure you have placed a handwritten return address on the top left corner of the envelope as stickers will be removed. You should not write or place anything else on the outside of the envelope. Ensure proper postage as it will be returned to you by the Post Office if there is an insufficient amount.
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Attorney Mail
In an effort to strengthen safety and security within the Middlesex Jail and House of Corrections (MJHOC) while ensuring attorneys’ accessibility, the Middlesex Sheriff’s Office (MSO) is implementing an Attorney Verification System (AVS) Protocol consistent with the Department of Corrections’ Standard Operating Procedure.
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SecureMail (Electronic Mail Messaging)
Effective October 16, 2017, the Middlesex Sheriff’s Office introduced SecureMail, an electronic mail messaging option, for all inmates and detainees at the Middlesex Jail and House of Correction.
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Books & Subscriptions
You may not mail in a newspaper or magazines – we accept them directly from the publisher or online retailer only. If you wish, you may call any number of newspaper or magazine suppliers to have them deliver to the facility.
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Prohibited Items
View a complete list of what items are prohibited through the mail.