If you no longer process charges through a Stripe account that has received an email about Strong Customer Authentication (SCA), no action is needed. If you have another active Stripe account and you are located in the European Economic Area (EEA), charges created through that account will be subject to the SCA regulation and your integration will need to be updated.
If you are unsure about which Stripe account the email applies to, you can click on the Visit the Dashboard link in the email and it will redirect you to the affected Stripe account.