If this is webmail, then you’ll have to contact iinet and let them know. This is due to a security setting they have set, and only they have the authority to make any security configuration changes.
I have contacted iinet- they say I must download & install a zip file, move the Final Draft to the zip file & send. Then the recipient must download & install zip file app to be able to receive & open the Final Draft attachment. This creates a problematic situation when corresponding with possible interested parties around the world for networking, funding applications etc…most will not engage… I’ll try iinet again & appeal to them to change the configuration. Thanks.