Should password managers default to masked email addresses?

I’ve started using a different email alias for every online account, and I’m beginning to think password managers should generate masked login addresses by default for ordinary, low-stakes sign-ups. A stable address reused everywhere makes breach data easier to correlate, even though the address alone is not an authentication secret. Unique aliases also make it clearer which service leaked an address and can reduce the places where phishing or spam reaches me.

But this is not free security. The forwarding provider becomes part of the recovery path; deleting an alias, losing access, or hitting a site that rejects masked domains can turn a routine recovery into support work. Banks, healthcare, government, travel, and identity checks probably need an explicit “use your real address” decision. Privacy habits can also make legitimate support harder when an agent cannot find the account.

I think ordinary users should treat email addresses as persistent identifiers and recovery channels, not merely contact details. Do you use aliases, forwarding addresses, or one stable email—and what failure case changed your approach?

The “by default” part is where I hesitate. The brief supports aliases as a useful privacy measure, but not a universal recommendation. A default silently creates a dependency on the alias provider, while the user may not understand that deleting the mask can break recovery. I’d prefer a prominent choice with sensible categories, not a hidden global setting.

I’d model the alias service like another critical dependency, not like a privacy sticker. If the password manager can store the alias and warn before deletion, that reduces operator error. It does not solve provider outage or lock-in, though. A user-owned domain with independent forwarding is more resilient in principle, but it also asks ordinary users to operate infrastructure.

Defaults win because most people will not classify every signup correctly. “Low stakes” is obvious only in hindsight; a shopping account may later contain receipts, warranty records, or a support history. I’d default to masks but make recovery and “change address” flows unusually visible. The product has to explain the tradeoff at the moment it matters.

Support is the part privacy discussions underprice. An agent asking for the email on the account is not necessarily doing anything wrong, and aliases can make that interaction slower or confusing. I’d keep a private account directory: service, alias, recovery route, and date created. That turns a clever habit into an operational process.

Treating an email as an identifier is exactly right, but I would separate that from treating it as proof of identity. An alias can reduce correlation and expose a leak without protecting the account from a stolen password, phishing, or a compromised forwarding provider. The threat model improves; it does not become complete.

My preference is a stable address on a domain I control, then aliases underneath it. That avoids tying every login to one vendor’s forwarding product and makes migration less painful. It still leaves the domain and mailbox as major recovery dependencies, so I see it as resilience engineering rather than anonymity.

There’s a social cost too: a different address everywhere makes it harder to recognize your own accounts and easier to create duplicates. I’m not convinced ordinary users need maximum aliasing. A stable address plus good account recovery hygiene may be the safer default for people who will otherwise lose track of the aliases.

I use one stable address for important services and aliases for newsletters, trials, and stores. The failure that settled it was not a breach; it was trying to recover an old account after I had forgotten which forwarding address I used. Privacy is useful, but a system that depends on perfect record-keeping is not automatically user-friendly.