Can Oracle supports the subdomain email option (using custom mailfrom)?

Summary

Can Oracle supports the subdomain email option (using custom mailfrom)?

Content

Hi,

we are getting undelivery notifications when we are using company domain email address in from email.
Ex: [email protected]

in Sr suggested that add oracle.com in company email domain server. we have conclusion from network team that we don't touch the SPF record of company domain email server as suggested in the SRs .

So we are trying to use email address which is subdomain of company.
Ex:Example email: [email protected]

Our network team need confirmation about below points.

• Whether Oracle supports the subdomain option (using custom mailfrom)