Hello,
By default, you can receive mail with the address of your virtual domai.
All mails receive with address info@primdomain.com, info@virtual1domain.com, ..., goes to the user info defined in your SME.
f you want to send email with the user info but with the address info@virtual1domain.com you can change that in your favorite mail client, by defining address like you want, or change the personnal information in the webmail options.
Regards,