No to both, and these are hard prohibitions rather than flexible guidelines. Inmates are not permitted to communicate directly with other inmates at other facilities, whether through email, letters, or any other channel. The concern is obvious: unchecked inmate-to-inmate communication across facilities creates serious risks around coordination of criminal activity, gang communication, intimidation of witnesses, and other security threats. The system is designed to prevent it.
Money transfers between inmates are equally prohibited. Inmates cannot send funds to each other's accounts. This restriction exists because money in the prison system is used as currency for all kinds of activity, and allowing inmates to transfer funds to each other would undermine the controls facilities rely on to manage commissary economies, debts, and the informal systems that can lead to extortion and violence.
The only narrow exception is in some cases where inmates are immediate family members, such as siblings or parent and child housed at different facilities. Even in those situations, approval is not guaranteed and requires specific authorization from facility administration. It is the exception, not a path that is reliably open.
For families on the outside, this means that communication and financial support for an inmate has to flow from people in the free world, not from other incarcerated individuals.