Hi @EyalGonen , I am not aware of a SAS option to enforce this. Most mail senders (and ISPs that process email) will have a variety of checks to guard against spoofing. So even if you change the FROM to be "mickey@disneyworld.com", the deliverability of that email may be at risk because it won't pass the rules.   If you omit FROM=, then the  SENDER= value will be used as the "From" address. If you omit SENDER=, then the sender is the address associated with the account running the SAS process. SENDER and FROM (and REPLYTO) can be different, and that's not uncommon. ... View more