The default email address used to send email from your website is being changed from firstname.lastname@example.org to email@example.com. 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 firstname.lastname@example.org to improve deliverability. You should now whitelist email@example.com.
Note: If you currently use domain based email (e.g. firstname.lastname@example.org) to send emails from your website, you are unaffected.