Hi @ywaka,
Yes, you will need either a Professional or Enterprise plan to enable Email MFA.
On the pricing page, we categorize MFA as either Pro MFA Factors or Enterprise MFA Factors. You can identify which factors fall under these categories by looking for the icon beside the MFA Factors on your Dashboard.
For example:
There should also be a warning at the top of the page if you are using a factor that requires a subscription upgrade:
If you are still able to use MFA regardless of your subscription, could you please let me know, and I can investigate this further?
Thanks,
Rueben