From the Free Bradley Manning Facebook page:
Thank you for supporting Bradley Manning! You can write to Bradley at the following address:
Commander, HHC USAG
Attn: PFC Bradley Manning
239 Sheridan Ave, Bldg 417
JBM-HH, VA 22211
Bradley is currently eligible to receive mail from anyone who wishes to write to him. Bradley does receive a good amount of mail from supporters; however, he usually only replies to family and longtime friends.
There are restrictions on what you can send. The military will reject any mail that violates postal regulations or contains obscenity, blackmail, contraband or threats. Additionally:
a) PFC Bradley Manning cannot receive any cash, checks, or money orders. His legal team is responsible for ensuring that Bradley has sufficient funds in his detainee account to purchase items such as stamps, envelopes, toothpaste, etc.
b) Photographs are only accepted if printed on copy paper. A maximum of six (6) pages are allowed. Pictures on photograph weight paper are not allowed.
c) Incoming mail will be returned to the sender if, in the opinion of the confinement facility, falls into any of the following categories: 1) Contains inflammatory material or advocates escape, violence, disorder or assault; 2) Directly or indirectly threatens the security, safety or order of the facility; 3) Contains coded or otherwise undecipherable language that prevents adequate review of the material; 4) Is received with “Postage Due”; or 5) Contains items of contraband (including anything of any material value, including postage stamps or cigarettes).
JBM is short for Joint Base Myer. HH is short for Henderson Hall–the unit that provides support services for JBM. Bradley has been officially “attached” to this support unit pending court martial. The commander of the unit is responsible forwarding Bradley’s mail appropriately, either to Fort Leavenworth, Kansas, or to the DC area confinement facility where he is held during Fort Meade court proceedings. The actual location of Bradley’s DC area confinement remains classified, but members of Bradley’s legal team regularly visit him at this facility. They continue to report that Bradley has no complaints regarding his treatment at this location. As this facility is geographically close to Quantico, Virgina, where Bradley was subjected to torture-like conditions for ten months, this remains a concern of ours.