Sent Message Decryption Timeout

ESME allows users to set a period of hours a SMS message can be decrypted for. By default this is 72 hours but this can be changed as a default with in the apps settings, or set on a per message basis when drafting a new encrypted message.

This means any SMS message you send using ESME can only be decrypted by the ESME app on the device registered with the telephone number you have sent the message too within the time frame you have specified.