The idea in one sentence

Replace the exposed route once legitimate relationships have moved. The point is not to make email mysterious; it is to stop one routine identifier doing too many jobs.

A useful boundary should make the next decision easier.

The problem it solves

New senders can keep using an address after each individual block. Consider this ordinary moment: an old competition address receives a changing cast of promotions. Without a boundary, the consequences can spread beyond the relationship that created them.

How to put it into practice

  • Identify the route
  • Move legitimate senders
  • Disable before deleting
  • Never reassign old addresses

Start with the next account rather than rebuilding your entire digital life in one weekend. Label the choice so future you knows why it exists.

Know the limit

Do not cut off receipts, warranties or people who still need the address. Treat the address as one layer alongside unique credentials, careful recovery and sensible judgement.

Give the next relationship its own route.

Create an MXDuck alias