we have a team working under us who are allocated to another company, Is it possible to create an email that will display the senders address as a different domain without owning that domain? for example: jon@home.com sends email that displays as from: jonsmom@work.com

"without owning that domain?" Nope Why aren't they using their own email via the web?

didnt think so We employ people to work on a specific companies jobs and the plan was to allow them to email as if from the company rather than ourselves. 1 other option I may propose to the powers that be is for the customer to give them an email address to use and we set that up as an account for them