For users on the Professional Plan, emails sent to your firstname.lastname@example.org will be forwarded to the email address attached to your account.
For example, if your username is jon.snow then emails sent to email@example.com would be forwarded to that account's primary email address used to log in firstname.lastname@example.org.
This is a great tool for users who want to hide their personal email address initially and still be available to contact from the public. However, please note when you reply to emails they will be sent from your personal email. This feature provides email forwarding, but not a full inbox to reply to emails from.
In addition to the Professional Plan, this feature also requires your email address to be verified with solo.to in order to use.