From Name Settings:
Configuring the From Name will set the From Display on outgoing emails:
You may pick from the Workspace name, the Slack User Name, or Custom. This setting will apply to any person pressing the "Send Email" button in any Centro email block message.
CC & BCC
For every outbound email, you may configure an email address to always be CC’d or BCC’d. An interesting BCC maybe your “My Email to Salesforce” custom email that enables Salesforce to automatically link outbound emails to Leads, Contacts, Opportunities, and Users. Talk to your Salesforce Admin on how to find this, reference this site from Salesforce. Make sure to fill out My Acceptable Email Addresses with your work email that’s associate with your Slack workspace: