It is proper Netiquette to use an appropriate from address. Don’t use a free address in the from field if you have domain.
Return Address Netiquette For Email
When accounts are aggregated users have a choice of email addresses to use in the from field for messages. A default account can be used. This default account can be changed manually from within the message composition.
Return Email Address
Free accounts are sometimes frowned upon. Responding to a message sent to a free account with a premium domain in the from address is a form of online status. Using your own domain shows status. Using a free domain is personal or amateur.
Return Address Netiquette
Use an appropriate from address because the default account may not be appropriate.