There is a relatively new version of RFSM8000 #535 In the email server mode - email would go out on the internet to someone's personal or bussiness email without a FROM address. Thus how to reply was difficult or non obvious.
This is now fixed. The FROM address is now the email address the RFSM8000 email server uses. The person replying still needs to start the subject with the call-sign of the RFSM8000 user who originated the message. Howard.