A role-based email address is an address that companies use to define a particular job or department of that company. Generally, these addresses are not associated with any one particular person at the company, but rather they can be checked by multiple people at the company. The role in the email address is specified before the domain in the address.
Some examples of what role-based email addresses might start with can be found below:
While the above list does not contain all of the role based email addresses, it can give you a general idea of how those addresses might look.