A compromised email account is an email account that has been accessed by an unauthorized person. Once an attacker gains access, they may use the account to send spam, distribute malware, steal sensitive information, or impersonate the account owner.
Understanding how email accounts become compromised can help you protect your email and avoid service interruptions.
Common Ways Email Accounts Become Compromised
Weak Passwords
One of the most common causes of compromised email accounts is the use of weak passwords.
Examples of weak passwords include:
-
Password123
-
CompanyName2024
-
Welcome1
-
Simple dictionary words
Attackers use automated tools that can test thousands of common passwords in a short period of time.
Password Reuse
Using the same password across multiple websites and services increases risk.
If another website experiences a data breach and your password is exposed, attackers may attempt to use the same credentials to access your email account.
This technique is known as "credential stuffing."
Phishing Attacks
Phishing emails are designed to trick users into revealing their passwords.
Common phishing tactics include:
-
Fake webmail login pages
-
Fake Microsoft 365 or Google Workspace login screens
-
Security warning emails
-
Account suspension notices
-
Fake invoices and payment requests
If a password is entered on a fraudulent website, attackers can immediately gain access to the account.
Malware and Keyloggers
Malicious software installed on a computer can capture:
-
Email passwords
-
Browser-saved credentials
-
Keystrokes
-
Session information
This information can then be transmitted to attackers without the user's knowledge.
Insecure Devices or Networks
Using email on unsecured computers or public Wi-Fi networks can increase the risk of account compromise, especially if the device itself is infected with malware or lacks proper security updates.
Stored Passwords in Email Applications
Many email programs and mobile devices store passwords for convenience.
If a device is lost, stolen, or infected with malware, stored credentials may be exposed.
Shared Email Credentials
Sharing email passwords with employees, contractors, friends, or family members increases the likelihood of accidental exposure.
The more people who know a password, the greater the risk of compromise.
Signs That an Email Account May Be Compromised
You may notice one or more of the following symptoms:
-
Large amounts of outgoing email you did not send
-
Bounce-back messages for emails you never sent
-
Complaints from recipients about spam
-
Unrecognized devices connected to the account
-
Unexpected password changes
-
Missing emails
-
New forwarding rules you did not create
-
Login attempts from unfamiliar locations
-
Hosting provider notifications regarding spam activity
What Attackers Do With Compromised Email Accounts
Send Spam
Compromised accounts are commonly used to send large volumes of spam email.
Because the messages originate from a legitimate email account, they may bypass some spam filters.
Conduct Phishing Campaigns
Attackers may send fraudulent emails to customers, vendors, or employees while pretending to be the account owner.
Harvest Contact Information
Attackers often review email conversations and address books to identify additional targets.
Steal Sensitive Information
Business communications, invoices, contracts, and personal information may be exposed if attackers gain access to an email account.
What To Do If Your Email Account Is Compromised
If you suspect unauthorized access:
Step 1: Change the Password Immediately
Log in to cPanel and update the email account password.
Use a strong, unique password that has not been used elsewhere.
Step 2: Scan Your Devices
Run a full malware and antivirus scan on all computers and mobile devices that access the email account.
Changing the password alone may not help if malware is still present.
Step 3: Review Email Clients
Update saved passwords in:
-
Outlook
-
Thunderbird
-
Apple Mail
-
Mobile devices
-
Other email applications
Step 4: Check Forwarders and Filters
In cPanel, review:
-
Email Forwarders
-
Email Filters
Attackers sometimes create hidden forwarding rules to monitor incoming messages.
Step 5: Review Other Accounts
If the same password was used elsewhere, change those passwords as well.
How to Protect Your Email Account
Use Strong Passwords
A strong password should:
-
Be at least 12 characters long
-
Include uppercase and lowercase letters
-
Include numbers and symbols
-
Be unique to the email account
Use Different Passwords for Different Services
Never reuse your email password on other websites.
Be Careful With Links and Attachments
Do not click links or open attachments from unknown or suspicious sources.
Always verify unexpected requests for passwords or sensitive information.
Keep Devices Updated
Install security updates for:
-
Windows
-
macOS
-
Mobile devices
-
Web browsers
-
Email applications
Use Antivirus and Anti-Malware Software
Regular security scans can help detect threats before they compromise your accounts.
Monitor Your Account Regularly
Review sent messages, login activity, and forwarding rules periodically to identify suspicious activity early.
Important Note About Spam-Related Suspensions
If a compromised email account is used to send spam, your hosting provider may temporarily restrict email services to protect server reputation and prevent blacklisting.
After securing the account, you may need to contact support to request that any restrictions be reviewed and removed.
Conclusion
Most compromised email accounts result from weak passwords, password reuse, phishing attacks, or malware infections. By following good security practices and monitoring your account regularly, you can significantly reduce the risk of unauthorized access and protect both your email account and your domain's reputation.
