You can set up a password and session policy for all users with verified domains in your account. You can make it stricter than the default. To do so, follow these instructions.

1. First of all, verify any domain. This is necessary because the rules will not work without users with verified domains.
2. Open the page /admin/account-settings?activeTab=password-policy
3. Make the rule stricter than the system default rule and save the changes

After these steps, the password or session policy will be applied to all users with email addresses from a verified domain.