Which email address can I use for two-factor authentication in connection with my EPO account?

You can use any email address (personal or company address).  

Key points to consider: 

• ensure continuous access to the email associated with your EPO account, especially if it's used for two-factor authentication 
• if you change companies, do not forget to update the email associated with your EPO account 
• consider having at least two backup methods for two-factor authentication to mitigate the risk of losing access to your old email account