InmateAid letters are sent the same day they are created by you via US Mail. The letters/photos are delivered to the inmate at mail call a day or two after posting. Please be mindful that the staff inside the prison opens every letter for contraband which may delay the actual delivery.
https://www.inmateaid.com/ask-the-inmate/how-long-does-it-take-an-inmate-to-receive-my-letter-when-i-send-it-from-inmateaidcom#answer
Accepted Answer Date Created: February 19,2013