Almost everyone arrives at this idea on their own. Your main address is getting hammered, so you open a second one and give that out instead: the junk account, the signup account, the one you do not care about. It costs nothing, it takes four minutes, and for a while it works.
Then, usually inside a year, it stops working. The junk moves in. You stop checking, so you miss the delivery notice and the fraud alert along with the discount codes. And when one of those companies sells your address on, you are back where you started, with a different name in the From field.
This is not an argument that the instinct is wrong. It is right, and it is pointing at something real. The problem is the shape of the answer, not the reason for it. Here is what a second account does for you, where it quietly fails, and what the same idea looks like with more structure.
The junk-account instinct, and why it is reasonable
The reasoning is sound. Your primary address stopped being a way to receive mail long ago and became an identifier. It is your login at dozens of services, the recovery route for your bank, and the way your employer and your children's school reach you. Handing that to a shop for a discount code on a pair of trainers is out of all proportion.
A second account separates two kinds of mail that genuinely are different: things you need to see, and things you agreed at some point to receive. That separation is worth having, and it costs nothing. It takes minutes, needs no subscription, and puts no new company in the path of your mail. If you have one and it is working, nothing here is a reason to delete it.
Problem one: it is one more inbox to check
The first failure is behavioural rather than technical. A second inbox only helps if you open it, and the entire appeal was that you would not have to.
So one of two things happens. Either you stop checking, and you miss the parcel that needs re-delivery, the password reset you asked for, the fraud alert on the card you only use online. Or you keep checking, and now you have two inboxes, two sets of notifications, and the overhead of remembering which address you gave to whom.
The second outcome is more common than people admit, and it ends slowly. Over a few years the junk account collects real mail, and it becomes a second real address carrying the same weight as the first. Then the original instinct fires again. The signs that yours has crossed that line are easy to spot.
- A bank, a tax office or an employer can reach you there.
- It holds something you would struggle to move: a domain, a shop with your order history.
- Someone you know uses it in preference to your main address.
- It is the recovery address for something else.
- Losing access to it would cost you an afternoon or more.
Problem two: it is still one address given to many services, so it leaks the same way
This is the structural failure, and it is the one that matters. A second account is still a single address handed out to a large number of unrelated companies. Everything you dislike about your main address comes from that shape, not from the name in front of the at sign.
Once an address is in a hundred databases it exists in a hundred places you do not control: a marketing platform, an analytics vendor, a support desk, a backup, an export somebody took when they left. Any one of them can leak or be sold, and the address is then burned everywhere at once.
Breach notification services will show you an address turning up in known public breaches, and a junk account often appears in more of them than the main one, because it went to more places.
Rotating out of it is possible in theory and miserable in practice. You have to find every service that holds the address, and providers differ in whether they will let you change it at all. Check before you assume it will be easy.
Problem three: no attribution and no off switch
Two things decide whether you can respond when a company mishandles your address, and a second account gives you neither.
The first is attribution: knowing who leaked. If every signup used the same address, an unwanted message tells you nothing about where it came from. The sender is a company you have never dealt with, and you cannot avoid the business that caused it, because you do not know which one it was.
The second is an off switch: stopping mail from one relationship without touching the others. A second account gives you one lever with two positions, keep it or abandon it. Unsubscribe links are not that lever, because they depend on the sender choosing to honour them, and a party trading in bought lists is not that sender. Filters are not it either: they hide mail after it has been accepted, and the address stays perfectly valid.
Deletion rights help less than you would hope. Under UK and EU data protection law you can ask an organisation to erase your personal data, although that right is not absolute. You can only use it against organisations you can name, and the list broker three hops downstream is not in your address book.
What a second account is genuinely good for, honestly
Some jobs suit a second account better than anything else does, and it is worth saying so plainly.
- Separating roles rather than senders. An address for a side business, a club or volunteering is a different identity with its own contacts and calendar, not junk mail management.
- Keeping a quiet archive. Receipts, warranties and travel bookings in one searchable place, away from work mail.
- A boundary you intend to walk away from. An account opened for one chapter of your life and closed deliberately at the end of it.
- Redundancy. A lockout or an outage at one provider does not remove your only route back into everything else.
There is also a free technique worth knowing before you pay anybody for anything. Many mail systems support subaddressing, where the part of the address after a plus sign is ignored for delivery, so mail to name+shop@example.com arrives at name@example.com. That gives you a per-service tag at no cost.
Be clear about what it is, though. Subaddressing is a widely supported convention, not a standard. RFC 5233 defines an extension to the Sieve filtering language so that rules can match the detail part of such an address, and its abstract opens by presupposing systems that already allow subaddressing rather than specifying it. The separator is left to each system, so some providers use another character, some do not support it, and some signup forms refuse a plus sign outright.
The bigger limit is that the tag comes off easily. Anyone who receives name+shop@example.com can delete it and reach you anyway, and your base address is sitting there in the string. For filing your mail it is excellent. For hiding from a party who does not want to be filtered, it is not.
So if your problem is filing rather than exposure, stop here. Subaddressing and a rule in your mail client, or a separate account for a genuinely separate role, is free and sufficient.
The same instinct with better structure
The idea underneath the junk account is address separation. The second account carries it out at the coarsest resolution available: two addresses, one for people and one for everything else. Turn the resolution up and the three failures above come apart one at a time.
One address per service, all of them forwarding into the inbox you already read. There is no second inbox, so there is nothing extra to check. Each address sits in exactly one company's database, so an unexpected message names its own source. And because the address does nothing but forward, switching it off costs you that one relationship and nothing else.
If you go that way, these are the properties worth looking for.
- Mail lands in the inbox you already use, with no separate mailbox to check.
- Replying works with no configuration, so answering a forwarded message does not hand over the address you were hiding.
- Switching an address off refuses mail at delivery time rather than filtering it after acceptance, so the sender learns the address is dead.
- Addresses are cheap enough that you make a new one per service without thinking.
- The provider is specific about what it stores, for how long, and what its encryption covers.
One limit runs across the whole category and is better learned now than later. Reply All puts the other people on a thread into your mail app as ordinary addresses, so replies to them go straight out from your real account. If staying masked matters, reply to the sender only.
None of this makes the junk account a mistake. It was a sensible response to a real problem, built with the only tool most people had. One spare address and one address per relationship are simply different strategies, and only the second still works in year three.