Hackers get your email and password through three main methods: data breaches (where companies get hacked and your stored credentials are stolen), phishing attacks (where fake emails trick you into entering your login details on a fake website), and credential stuffing (where passwords stolen from one site are automatically tried on hundreds of other sites).
How do hackers actually get your email address?
Your email address is not a secret. It is designed to be shared — you give it to every website you sign up for, every service you subscribe to, and every person you communicate with. Hackers collect email addresses from:
- Data breaches — when companies get hacked, their entire user database (including your email) is stolen and shared on underground forums
- Public sources — social media profiles, business directories, GitHub, personal websites, and domain registration records
- Data brokers — companies that collect and sell personal information, including email addresses
- Web scraping — automated tools that crawl websites and harvest any email addresses they find
- Purchased lists — stolen or leaked email lists sold on dark web marketplaces
Your email address alone is not particularly dangerous. The real danger starts when hackers pair it with your password.
Method 1 — Data breaches (most common)
This is by far the most common way hackers get your credentials. A company you have an account with gets hacked. The attackers steal their database, which contains your email and password (and often other personal data).
The stolen database is then shared or sold on underground forums. Other hackers buy it and use automated tools to try those email/password combinations on other popular sites.
The scale is enormous. Over 12 billion records from 962+ known breaches are publicly documented, and many more breaches go unreported. If you have been using the internet for more than a few years, your credentials have almost certainly been stolen in at least one breach.
The worst part: many companies do not discover they have been breached for months, and it takes even longer for them to notify users. Your data could be circulating in criminal forums long before you find out.
Check if your email is in a known breach — free
Method 2 �� Phishing emails
Phishing is when an attacker sends you an email that looks like it is from a legitimate company — your bank, your email provider, a delivery service — and tricks you into clicking a link and entering your login details on a fake website.
These fake sites look nearly identical to the real thing. The URL is slightly different (like “g00gle.com” instead of “google.com”), but most people do not notice.
Modern phishing attacks are sophisticated:
- They use your real name (obtained from a previous breach)
- They reference real transactions or account activity
- They create urgency — “Your account will be locked in 24 hours”
- They may come from compromised email accounts of people you know
Once you enter your credentials on the fake site, the attacker has them immediately and can log into your real account within seconds.
How to protect yourself: Never click login links in emails. Always go directly to the website by typing the URL in your browser.
Method 3 — Password reuse attacks (credential stuffing)
Credential stuffing is when hackers take a list of stolen email/password pairs from one breach and automatically try them on hundreds of other websites.
This works because most people reuse passwords. If your password for a breached gaming site is the same as your email password, attackers can access your email account using credentials stolen from the gaming site.
Automated tools can test thousands of credential pairs per minute across dozens of websites simultaneously. If your password was in any breach and you use it on other sites, it is only a matter of time before it is tried there.
This is the number one reason to use a unique password for every site. If every password is different, a breach at one site cannot affect any other account.
Method 4 — Buying stolen data on the dark web
The dark web is a part of the internet that requires special software to access and is not indexed by regular search engines. It hosts marketplaces where stolen data is bought and sold.
A single stolen email/password pair might sell for less than a dollar. But databases containing millions of credentials sell for thousands. Financial data (credit cards, bank logins) commands higher prices.
Some dark web services offer “combo lists” — massive compilations of email/password pairs from hundreds of different breaches merged into one file. These are used for credential stuffing attacks at massive scale.
The uncomfortable reality is that once your data is on the dark web, it stays there forever. You cannot remove it. The only defence is making the stolen data useless by changing your passwords and adding two-factor authentication.
Method 5 — Malware and keyloggers
Malware is malicious software that infects your computer or phone. Some types specifically target credentials:
Keyloggers record every keystroke you type, including passwords, and send them to the attacker.
Info-stealers scan your browser’s saved passwords, cookies, and autofill data and send everything to the attacker.
Man-in-the-browser attacks modify your browser to intercept data you enter on websites, including login forms on legitimate sites.
Malware typically gets onto your device through:
- Downloading software from unofficial sources
- Opening infected email attachments
- Clicking malicious ads (malvertising)
- Visiting compromised websites
How to protect yourself: Keep your operating system and browser updated, do not download software from untrusted sources, and use an antivirus programme.
How do you know if hackers have your password?
The clearest sign is finding your email in a known breach database. Use EmailLeaked to check — it scans 12 billion+ records and tells you instantly which breaches your email appeared in and what data was exposed.
Other warning signs:
- You receive alerts about login attempts you did not make
- Your password stops working on a site you use regularly
- You see unfamiliar devices in your account’s login history
- Friends receive messages from your account that you did not send
- You get password reset emails you did not request
If you see any of these signs, change your password immediately and enable two-factor authentication.
How to stop hackers getting your credentials
Use a unique password for every account. A password manager generates and stores a random password for each site. You only need to remember one master password. This is the single most effective thing you can do.
Enable two-factor authentication. Even if your password is stolen, 2FA stops attackers from logging in. Use an authenticator app rather than SMS codes when possible.
Never click login links in emails. Always go directly to websites by typing the URL. This eliminates phishing as a threat vector.
Keep your software updated. Most malware exploits known vulnerabilities that have already been patched. Keeping your operating system, browser, and apps updated closes these holes.
Check for breaches regularly. Use EmailLeaked to check your email against known breaches. The sooner you know about a breach, the faster you can change your password before it is used against you.
Be cautious about downloads. Only install software from official app stores and trusted sources. Do not open unexpected email attachments.
Frequently asked questions
Can hackers access my account without my password?
Sometimes, yes. If a website has a security vulnerability, hackers may be able to bypass the login entirely. Session hijacking (stealing your browser cookies) can also grant access without a password. This is rare for major services, but it happens. Two-factor authentication protects against most of these methods too.
What do hackers do with stolen email addresses?
They sell them in bulk on dark web marketplaces, use them for phishing campaigns, include them in spam lists, and pair them with passwords for credential stuffing attacks. An email address confirmed to be active (through a breach) is more valuable than a random one because the attacker knows a real person uses it.
How long do hackers keep stolen data?
Forever. Digital data can be copied infinitely at no cost. A breach from 2015 is still circulating and being used in attacks in 2026. This is why old breaches still matter — and why you should change passwords for any accounts involved in past breaches, even old ones.
What is the dark web and is my data on it?
The dark web is a part of the internet only accessible through special software (like Tor). It hosts marketplaces for stolen data, among other things. If your email has appeared in any known breach, your data is very likely on the dark web. Check your email here to find out which breaches exposed your data.
Does changing my password stop hackers?
It stops them from using the specific stolen password to access that account. But if you change it to something weak or similar to the old one, or if you reuse the new password on other sites, you are still vulnerable. Always use a completely new, random, unique password for each account.
What is credential stuffing?
Credential stuffing is an automated attack where hackers take stolen email/password pairs from one breach and try them on other websites. It works because most people reuse passwords. If your LinkedIn password was stolen and it is the same as your bank password, the attacker gains access to your bank. The defence is simple: never reuse passwords.