Say, campaign sending email address: email@example.com
If domain is verified then no need to verify firstname.lastname@example.org
but if you still have the email address in the verified list please remove it from the verified list.
Multiple IEM instance - send campaign using different email address under the same domain.
email@example.com on first instance
firstname.lastname@example.org on second instance.
Then please inform us during purchase or first installation. We have solution for this situation.