Email Privacy — Stop Data Brokers From Finding You
Your email address is the connective tissue of your online identity. Here's how to protect it.
Last verified: February 2026
The Core Problem
Data brokers cross-reference your email address across thousands of data sources to build profiles. Once your real email links your Amazon account, your forum posts, a data breach, and a local business loyalty card — you're identifiable across the web. Email aliasing breaks this linkage by giving each service a different address.
How Data Brokers Use Your Email Address
Your email address isn't just a contact method — it's a universal identifier that ties together your entire online life. Here's how data brokers exploit it:
1. Cross-Site Identity Matching
When you use the same email on a shopping site, a news forum, and a loyalty program, data brokers can match those records to the same person. They build a profile: your name from one source, your address from another, your purchase history from a third. Your email is the key that links them all.
2. Breach Data Aggregation
Every time a site is breached, the leaked data usually includes email addresses. Data brokers and identity thieves collect these breach dumps and merge them into master databases. If your email appears in 10 different breaches, they know exactly what services you use and have your old passwords to try.
3. Email Hashing for Ad Targeting
Many companies upload "hashed" email lists to ad platforms (Facebook Custom Audiences, Google Customer Match). Even though the email is technically hashed (converted to a unique code), it's still matchable if your real email is in the advertiser's list. This is how you see ads for something you searched on one site appear on a completely different platform.
4. Email Tracking Pixels
Marketing emails embed invisible 1x1 pixel images. When you open an email, the pixel loads — revealing your IP address, location, device type, operating system, and exact time of opening. This data is sold to data brokers and used for profiling. Even unsubscribing can confirm your email is active, sometimes increasing the volume of marketing.
What Email Aliasing Does
An email alias is a unique, disposable address that forwards to your real inbox. You give each service a different alias — so if one service leaks or sells your email, only that alias is compromised. Your real address stays private.
How it works in practice
You sign up for a newsletter. Instead of yourname@gmail.com, you give them newsletter-techcrunch@simplelogin.io
SimpleLogin forwards emails from that alias to your real Gmail. You receive the newsletter normally.
If TechCrunch starts spamming you or sells your email, you deactivate that one alias. No other accounts are affected. Your real address was never exposed.
Data brokers now see dozens of different email addresses for "you" — none of them your real one, making cross-site profiling nearly impossible.
Email Alias Service Comparison
All four services forward email to your real inbox and let you reply from the alias. Your real address is never revealed to the sender.
| Service | Free Tier | Price (unlimited) | Open Source | Custom Domain | Best For |
|---|---|---|---|---|---|
| SimpleLogin Best overall | Unlimited (iCloud+) | $30/yr | Yes | Yes | Privacy-first users, Proton ecosystem |
| AnonAddy Best value | 10 aliases | $36/yr | Yes | Yes | Cheapest unlimited option |
| Apple Hide My Email Best for Apple users | Unlimited (iCloud+) | iCloud+ required | No | No | Apple ecosystem users already paying for iCloud+ |
| Firefox Relay Best browser integration | 5 aliases | $47.88/yr | Yes | No | Firefox users wanting simple integration |
SimpleLogin
Best overallFree (10 aliases) / $30/yr premium (unlimited)
Proton Mail native
Visit SimpleLoginAnonAddy
Best valueFree (10 aliases) / $12/yr lite (50 aliases) / $36/yr pro (unlimited)
Any mail provider
Visit AnonAddyApple Hide My Email
Best for Apple usersIncluded with iCloud+ ($0.99/mo+)
Apple Mail, iCloud
Visit Apple Hide My EmailFirefox Relay
Best browser integrationFree (5 aliases) / $3.99/mo premium (unlimited + phone mask)
Firefox browser
Visit Firefox RelayStep-by-Step: Set Up Email Aliasing with SimpleLogin
SimpleLogin is the most full-featured free option and integrates natively with Proton Mail. The steps below apply to the free plan — no credit card required.
Create a SimpleLogin Account
Go to simplelogin.io and sign up. Ironically, use an email address you trust for this signup — this is your real inbox where all forwarded mail will arrive. If you have a Proton Mail account, sign in with that for seamless integration.
Install the Browser Extension
Install the SimpleLogin browser extension (Chrome, Firefox, Safari). When you're on a signup form, click the extension icon to generate a new alias for that site automatically. The extension fills in the alias for you.
Create Your First Alias
In the SimpleLogin dashboard, click "Create New Alias." You can either:
- Random alias: e.g.,
autumn.field.42@simplelogin.com— anonymous, harder to trace - Custom alias: e.g.,
amazon-shopping@simplelogin.com— descriptive, easy to remember which service it's for
Give each alias a note describing which service it's for. You'll thank yourself later when spam arrives and you can instantly trace which company sold your data.
Use Aliases Going Forward
Every time you sign up for a new service, create a new alias. The browser extension makes this one click. For services you already have accounts with, change your email to a new alias — start with high-risk sites (shopping, newsletters, free apps) first.
Deactivate Compromised Aliases
When spam starts arriving to a specific alias, you know exactly which service leaked your email. Toggle the alias off in SimpleLogin — all future email to that alias bounces. Create a new alias and update your account on that service.
When to Use Your Real Email vs an Alias
Not all services warrant an alias — and some situations require your real email.
Use an Alias For
- +E-commerce and shopping sites
- +Newsletter subscriptions
- +Free apps and services (especially "sign in with email")
- +Loyalty programs and discount signups
- +Any site where you're uncertain about privacy practices
- +Online forums and communities
- +Contest entries and giveaways
Use Your Real Email For
- !Banking and financial accounts
- !Healthcare providers and insurance
- !Government services (IRS, DMV, SSA)
- !Work and professional contacts
- !Recovery contacts (for your alias service itself)
- !Anything where identity verification is required by law
Important: Don't lose access to financial accounts
If you use an alias for your bank and then your alias service has an outage or you cancel your plan, you could be locked out of critical financial accounts during 2FA or password recovery. For high-stakes accounts, use your real email.
Additional Email Privacy Tips
Block Tracking Pixels
Tracking pixels in marketing emails reveal your IP, location, and exact read time. Block them by:
- Proton Mail: Remote content is blocked by default
- Apple Mail: Settings → Privacy Protection → Block All Remote Content
- Gmail: Gmail proxies images (hides your IP) but still loads them. Use a browser extension like uBlock Origin for full blocking
- Hey.com: Purpose-built email service with spy pixel blocking and email sorting
Use a Privacy-Focused Email Provider
Gmail scans your email content to build advertising profiles. Privacy-focused alternatives:
- Proton Mail (proton.me) — end-to-end encrypted, free tier available, based in Switzerland
- Tutanota (tuta.com) — encrypted, open source, based in Germany
- Fastmail (fastmail.com) — not encrypted at rest but no ad profiling, $3/mo
Unsubscribe Strategically
Unsubscribing from legitimate companies is fine — they're required to honor unsubscribes. For spam and suspicious senders, do NOT click unsubscribe links — these confirm your email is active and may increase spam. Instead, mark as spam or (with aliasing) deactivate the alias entirely.
Check Which Services Have Your Email
Use our Privacy Audit tool to assess your overall exposure, and our Data Broker Guide to remove your email from people-search sites that have already linked it to your profile.
Frequently Asked Questions
Can I reply from an alias without revealing my real email?
Yes — all four services support replying. When you reply to a forwarded email, the reply is sent through the alias service, so the recipient sees your alias address, not your real inbox address.
What happens to my alias if I stop paying for the service?
It depends on the service. SimpleLogin and AnonAddy both have free tiers that let you keep a limited number of aliases if you downgrade. Aliases you created above the free limit may be deactivated. Always export your alias list before canceling a paid plan. This is why it's best to use an alias service with a genuine free tier.
Will businesses accept alias email addresses?
Most will. Some businesses block certain alias domains, particularly disposable email services. SimpleLogin and AnonAddy use persistent aliases (not truly disposable), so they're generally accepted. If a site blocks the default domain, you can use a custom domain alias (premium feature) or fall back to your real email for that service.
Is email aliasing legal?
Yes, completely legal. You are not misrepresenting your identity — the alias forwards to your real inbox, and you can receive and reply to email normally. You're simply controlling which address you share publicly. Many businesses use custom email domains for exactly the same reason.
Can data brokers still find me if I use aliases?
Aliasing significantly reduces your exposure but doesn't eliminate all data broker tracking. Data brokers also use your name, physical address, phone number, IP address, and device fingerprinting. For comprehensive protection, combine email aliasing with data broker opt-outs, a VPN, and removing your information from people-search sites. See our Data Broker Guide.
Does Apple Hide My Email work with non-Apple devices?
Limited. Apple Hide My Email aliases can be managed at icloud.com on any browser, and they forward to your iCloud email address which you can check from any device. However, the automatic alias-creation feature works best within Safari and Apple apps on Apple devices. For cross-platform use, SimpleLogin or AnonAddy are better.
Remove Your Email From Data Brokers
Your existing email address may already be in data broker databases. Remove it now.
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