I recommend using a distribution list instead of an alias to ensure that you don't have a single point of failure 🤷
Aliases allow you to have multiple email addresses that point to a single mailbox. A distribution list sends to multiple email addresses when you email a single email address.
The usual suspects are identified in the following documents: RFC 822 & RFC 2142.
Implementation gotchas:
- GMail: Reserved aliases for spam and abuse policy in Gmail and Google Workspace
- Azure Active Directory: Highly privileged email aliases that can only be created by an Azure AD global administrator