Invalid from address

Please i am trying to setup dude to send emails which i have done before

However when i test the settings i get “invalid FROM address”

My From address is actually a valid address on my mail server

server ip has also been configured

Please any idea?

Try a non real address? Are you sending mail to an exchange server?

NO i am not sending to Exchange

I set the dude up and a physical computer here and the email system works

However i need it to be setup on a widows 7 PC in my cloud network for an independent result.

That is where i get invalid from address

Is it a bug that has to do with virtualization?

Kindly help