What happens if I try to add a role based email address as a subscriber?
The best course of action is therefore to try to eliminate any role based email addresses before trying to import into your Mailchimp list. But this isn’t always simple to do.
How to add email addresses that Mailchimp won’t import
Mailchimp provides a report when you import subscribers. In this report it will be identified which email addresses have not been imported due to being role-based email addresses. If you click the number of emails that were role-based or known invalid email address(es) a list of the addresses will be provided.
To add the addresses that could not be imported is actually relatively simple; just add the subscribers one at a time (rather than using the import functionality). Be aware however that adding these addresses may well be detrimental to the reputation of your list.
In summary, role-based email addresses can’t be imported however can be added one by one as a subscriber. It is always best however to avoid adding role-based email addresses if at all possible.