The default email address used to send email from your website is being changed from email@example.com to firstname.lastname@example.org. This includes notification and confirmation emails from various tools, mass emails, the weekly calendar email, etc.
Why does this matter?
Some recipients may have whitelisted email@example.com to improve deliverability. You should now whitelist firstname.lastname@example.org.
Note: If you currently use domain based email (e.g. email@example.com) to send emails from your website, you are unaffected.