[MM3-users] How to disable the password reset email, from being sent to an address not in our database?

Hi - Someone just requested a password reset, for an email address not in the mailman database. Mailman sent a message to them, but the email was invalid. I would like to disable an email from being sent to a user not in the mailman database. How to do this? Thanks. - Mark

Hello from MIT PSFC Mailing Lists!

You are receiving this e-mail because you or someone else has requested a password for your user account. However, we do not have any record of a user with email hwbaCXa@zTi.com in our database.

This mail can be safely ignored if you did not request a password reset.