Gmail may add an extra verification step when you try to do things like adding a forwarding address and editing your filters, Google announced in a blog post on Wednesday. The extra step could help prevent a bad actor who has access to your account from filtering emails in ways you don’t expect or forwarding emails to a new address without you knowing.
Here are the specific scenarios where Google may add the additional step, from Google’s post:
Filters: creating a new filter, editing an existing filter, or importing filters.