Why Email Attachments Are a Security Risk (And What to Do Instead)

Email was invented in 1971—long before anyone imagined we'd use it to send contracts, bank statements, or MyKad copies. Yet today, 67% of Malaysian businesses still send sensitive documents as email attachments. This is like sending a postcard through the mail: anyone handling it can read its contents.

The Hidden Dangers of Email Attachments

1. No Real Encryption

While emails may be encrypted in transit (TLS), they're stored unencrypted on multiple servers—your email provider's servers, your recipient's email provider's servers, and sometimes in backups. This means your confidential contract could be sitting on a server in another country, accessible to anyone who breaches that system.

2. No Proof of Delivery

Email read receipts are notoriously unreliable. They can be disabled, ignored, or faked. If a client later claims they never received a contract, you have no legal proof otherwise. This can be devastating in contract disputes.

3. No Control After Sending

Once you hit send, you lose all control. The recipient can forward your document to anyone, download it, or share it. You can't revoke access or set an expiration date.

4. Easy to Send to the Wrong Person

Auto-complete in email clients has caused countless data breaches. A single typo could send sensitive client data to a stranger. In 2023, a Malaysian law firm accidentally sent confidential case documents to the wrong email address, resulting in a PDPA complaint and reputational damage.

5. Phishing and Interception

Email is the primary vector for cyberattacks. Sophisticated phishing emails can intercept attachments or trick recipients into revealing login credentials. Business Email Compromise (BEC) attacks cost Malaysian businesses millions annually.

Real-World Examples of Email Attachment Breaches

What Are the Alternatives?

Secure Document Sharing Platforms

Instead of email attachments, use secure platforms like TrustNvelope that offer:

• End-to-end encryption: Documents encrypted on your device, only decrypted on recipient's device
• Access controls: 2FA verification before viewing
• Expiration dates: Documents automatically disappear after set time
• Audit trails: Every view recorded and timestamped
• Revocation: Cancel access anytime, even after sending

Encrypted File Sharing Services

Services like Tresorit or Sync.com offer encrypted file sharing, but lack the audit trails and digital signatures needed for business contracts.

Client Portals

Some businesses use client portals, but these require recipients to create accounts, creating friction.

How TrustNvelope Solves Email's Problems

Email Attachment	TrustNvelope
No encryption at rest	✅ AES-256 encryption
No proof of delivery	✅ Immutable audit trail
Cannot revoke access	✅ Revoke anytime
No expiration	✅ Auto-expire documents
Can be forwarded	✅ Cannot be forwarded
No identity verification	✅ 2FA verification

Best Practices for Document Sharing

1. Never send sensitive documents as email attachments - Use secure platforms instead
2. Verify recipient identity - Always confirm you're sending to the right person
3. Use encryption - Ensure documents are encrypted end-to-end
4. Set expiration dates - Limit how long documents are accessible
5. Maintain audit trails - Keep records of who accessed what and when
6. Train your team - Ensure everyone understands document security risks

Conclusion

Email was revolutionary for its time, but it's not designed for the security needs of modern business. With data breaches on the rise and regulations like PDPA imposing strict requirements, it's time to move beyond email attachments for sensitive documents.

TrustNvelope provides the security of a bank vault with the simplicity of email. Join our waitlist to be among the first to experience secure document sharing the way it should be.