TL;DR
Yahoo Mail has suffered the largest data breaches in internet history — 3 billion accounts compromised. If you're still using Yahoo for email, your messages are sitting on a platform with a proven track record of failure.
Switching to Proton Mail takes 10 minutes. Import your Yahoo inbox, set up forwarding, and start with a free account or upgrade from $1/month.
Why You Should Have Left Yahoo Years Ago
Yahoo's Breach Timeline
2013: 3 billion accounts breached (disclosed in 2017). 2014: 500 million accounts breached (disclosed in 2016). 2015-2016: Yahoo secretly scanned all incoming emails for US intelligence agencies. These aren't minor incidents — this is a pattern of systemic security failure and active cooperation with government surveillance.
Beyond the breaches:
- Aggressive advertising — Yahoo Mail is built around ad revenue, not user privacy
- Email scanning — your messages are analysed for ad targeting
- No encryption — Yahoo has never offered end-to-end encryption
- Verizon ownership — Yahoo is owned by Apollo Global Management (acquired from Verizon). Your data is a corporate asset, not a private communication.
- Secret government scanning — Yahoo built a custom tool to scan every single incoming email for US intelligence. No other major email provider has been caught doing this.
If you're reading this, you already know you should switch. Here's exactly how.
Step 1: Create Your Free Proton Mail Account
Sign up at Proton Mail — the free plan includes 1 GB storage, end-to-end encryption, and zero ads.
New for 2026: Mail Plus is now $1/month (introductory price) — 15 GB storage, 10 email addresses, custom domains, and email aliases. There's also 40% off annual plans.
Step 2: Import Your Yahoo Emails
Proton's Easy Switch imports your Yahoo inbox:
- Log into Proton Mail → Settings → Import via Easy Switch
- Click Import from Yahoo
- Sign into your Yahoo account when prompted
- Choose what to import: emails and contacts
- Click Start Import
💡 Change Your Yahoo Password First
Before you start the migration, change your Yahoo password and enable two-factor authentication on your Yahoo account. Given Yahoo's breach history, this protects your account during the transition period while forwarding is active.
Step 3: Set Up Yahoo Forwarding
- In Yahoo Mail, click the gear icon → More Settings
- Go to Mailboxes
- Select your Yahoo email address
- Under Forwarding, enter your new Proton Mail address
- Verify the forwarding address using the code Yahoo sends to Proton
All future Yahoo emails now land in your Proton inbox. Your Yahoo account stays active as a safety net.
Step 4: Set Up Proton on Your Phone
Download Proton Mail for iOS or Android. Sign in, and your imported inbox plus all forwarded messages are right there. Push notifications work just like Yahoo's app — but without the ads.
Step 5: Update Your Critical Accounts
Given Yahoo's breach history, prioritise updating these services to your Proton address immediately:
- Banking and financial services — if your Yahoo address was in the breach, attackers may have targeted these
- Any account where you reused your Yahoo password — change the password AND the email address
- Government and tax services
- Healthcare providers
- Primary shopping accounts (Amazon, eBay) — these store payment info linked to your email
⚠️ Important: Check Have I Been Pwned
Visit haveibeenpwned.com and enter your Yahoo email address. If it shows up in known breaches (it almost certainly will), treat every account linked to that address as potentially compromised. Change passwords everywhere and update to your new Proton address.
Step 6: Consider Deleting Your Yahoo Account
Unlike Gmail or Outlook, there's a genuine security argument for closing your Yahoo account entirely once you've migrated. A dormant Yahoo account with your personal information is a liability — it's sitting on infrastructure that has been breached multiple times.
If you do decide to close it, make sure you've:
- Imported all emails via Easy Switch
- Updated every important service to your Proton address
- Waited at least 30 days with forwarding active to catch stragglers
- Downloaded any attachments or files you need to keep
Proton Mail vs Yahoo Mail — Quick Comparison
FAQ
Was my Yahoo account breached?
If you had a Yahoo account before 2017, almost certainly yes. The 2013 breach affected all 3 billion Yahoo accounts. Check haveibeenpwned.com to confirm.
Will I lose my Yahoo emails?
No. Easy Switch copies your emails to Proton — it doesn't delete them from Yahoo.
Can I send from my Yahoo address inside Proton?
Yes. Set up your Yahoo address as an external account in Proton Mail settings. You can choose which address to send from when composing a message.
Is Yahoo Mail really that bad?
Yahoo Mail is the only major email provider that has been caught secretly scanning all incoming emails for a government intelligence agency. Combined with the largest data breaches in history and an advertising-first business model, it is objectively the worst choice for private email.
The Bottom Line
Yahoo has had more than a decade to fix its security. It hasn't. The breaches, the government scanning, the advertising — none of it has changed.
Proton Mail has operated since 2014 with zero data breaches, end-to-end encryption, and Swiss legal protection. The switch takes 10 minutes. Start for free — or upgrade from $1/month for 15 GB of storage.
After 3 billion breached accounts, the question isn't "should I switch" — it's "why haven't I already?"