Description

There are a few users abusing legal forms, we should make it possible to filter messages with particular content. Optimally, it should appear to the form submitter that everything worked (may be worth adding a sleep for example to not change behavior, but basically just don't send the email).

More details about the specific form and the content we can use to block the email - https://mozilla.slack.com/archives/C4XSHENBY/p1617919909062200

Success Criteria

• An element contributing to the definition of done for the card
• Tasks should be represented here as something like "Approved designs attached to this issue"