Email Encryption for Firms That Handle Sensitive Client Data
CPA firms, law offices, and financial advisors are required to protect client information in transit. Here’s how to meet compliance without adding complexity to your workflow.
If You Handle Client Financial, Legal, or Personal Data — You Need to Encrypt Email
Regulators, bar associations, and insurance carriers have made it clear: sending sensitive client information over unencrypted email is a liability. The specific requirements depend on your industry, but the obligation is the same.
CPA & Accounting Firms
FTC Safeguards Rule / GLBA
- Tax returns, SSNs, W-2s, K-1s
- Bank account & routing numbers
- Financial statements & payroll
- Penalties up to $46,517/day
Law Firms
ABA Rule 1.6 / Ethics Opinions
- Privileged communications
- Settlement & contract docs
- Client financial records
- Disciplinary & malpractice risk
Financial Advisors
SEC / FINRA / GLBA
- Account statements & portfolios
- SSNs & identity documents
- Trade confirmations & plans
- Regulatory & fiduciary liability
Regulators, bar associations, and insurance carriers have made it clear: Every day, your team sends emails containing the most sensitive information your clients have. Without encryption, each of those emails is a potential compliance violation, an uninsured breach, and a trust problem waiting to happen.
Cyber insurance carriers are watching. Many now require documented email encryption as a condition of coverage. A breach involving unencrypted client data can result in a denied claim — meaning your firm absorbs the full cost of regulatory fines, legal liability, and remediation.
The Solution: Bracket + CloudFilter
We deploy Bracket by Mailprotector for email encryption and CloudFilter for inbound email security and outbound content protection. Together, they deliver compliance-grade email security that your team will actually use — because it takes about five seconds to learn.
Sending Encrypted Email Is This Simple
To send an encrypted email, wrap the subject line in brackets:
EXAMPLE
Subject: [2025 Tax Return – Smith Family Trust]
That’s the entire process. No plugins, no apps, no special software. Works from Outlook, your phone, webmail — any email client on any device. The message is encrypted with AES-256, your recipient gets a secure notification, and your firm has documented, compliant delivery.
Legacy encryption solutions require portal logins, dedicated plugins, or policy engines that need ongoing administration. Bracket eliminates all of that. If your team can type a subject line, they can encrypt an email.
What Your Clients Experience
Your clients receive a branded notification email. They click a secure link, verify via their own inbox — no account to create, no password to manage — and read the message and attachments. They can reply securely in the same thread.
This matters because the number one reason encryption fails at firms your size is client friction. If your client has to create a portal account, remember a password, and navigate a separate system just to read a tax return or a settlement agreement, they’ll call your office and ask you to “just email it normally.” Bracket removes that problem entirely.
Bracket Share: Secure Client Uploads
Each team member gets a personalized secure upload link. Add it to your email signature or website so clients can send you sensitive documents — tax records, bank statements, discovery materials, account applications — securely at any time. No account required on their end. Files up to 1 GB with up to 25 attachments per message.
The Safety Net: Outbound Content Protection
People forget. CloudFilter’s outbound content rules act as a backstop. We configure pattern-matching rules to detect common PII formats — Social Security numbers, credit card numbers, EIN/TIN patterns — in outbound email. If someone on your team sends sensitive data without encrypting it, the system flags or holds the message before it leaves your network.
CloudFilter also handles inbound email security — filtering spam, phishing, malware, and impersonation attacks before they reach your mailboxes.
Security Under the Hood
Bracket’s simplicity is by design, not by compromise. Here’s what’s happening behind that pair of brackets:
- AES-256 encryption with distributed multi-layer key architecture and automatic key rotation
- Passwordless authentication — recipients verify via their own inbox with device fingerprinting and geolocation checks. Sign-in links are single-use and expire in 15 minutes.
- Open notifications — senders receive confirmation when a recipient opens an encrypted message, providing proof of delivery for compliance documentation
- Subject line protection — optional setting hides the email subject in notification previews, preventing sensitive case names or client details from appearing in the recipient’s inbox
- Ephemeral storage — messages auto-expire after 1 year (configurable shorter). Sensitive data is not stored permanently. Archive journal integration available for retention requirements.
- Personal data key — optional feature where only the user holds the decryption key. Not even Mailprotector can read the messages.
Compliance Alignment
This solution addresses requirements across the regulatory frameworks that govern professional services firms:
| Requirement | How We Address It |
|---|---|
| Encrypt data in transit GLBA · ABA 1.6(c) · SEC | AES-256 encryption on all Bracket messages. Data encrypted in transit and at rest on Bracket servers. |
| Data loss prevention FTC Safeguards Rule | CloudFilter outbound content rules detect SSN, credit card, and TIN patterns. Holds or flags messages sent without encryption. |
| Access controls FTC Safeguards · ABA 477R | Passwordless inbox authentication with device fingerprinting, geolocation verification, and single-use 15-minute sign-in links. |
| Reasonable security measures ABA Rule 1.6(c) · Ethics Opinions | AES-256 encryption, delivery confirmation, secure file transfer, and content-based safety net rules — documented and auditable. |
| Monitoring and logging FTC Safeguards · FINRA | Open notifications confirm delivery. CloudFilter logs all inbound/outbound message activity with detailed analytics. |
| Secure data disposal FTC Safeguards Rule | Messages auto-expire (default 1 year, configurable). No permanent PII stored in the encryption platform. |
| Service provider oversight FTC Safeguards Rule | Managed and monitored by PremierePC Technology Group as your IT security provider. |
Getting Started
We handle everything. Here’s what the process looks like:
- We configure it — Bracket licenses provisioned, CloudFilter deployed, outbound content rules set, Microsoft 365 integration completed.
- Your team activates — Each user gets a welcome email. Setup takes under 2 minutes per person.
- Quick reference provided — One-page guide covering how to send encrypted email, access received messages, and use Bracket Share.
- Email signatures updated — We add your secure upload link so clients can send you documents securely from day one.
- Ongoing management — We monitor filtering, tune content rules, and handle support. You focus on your clients.
Frequently Asked Questions
CPA & accounting firms: Yes. The FTC Safeguards Rule under the GLBA classifies CPA firms as financial institutions, requiring encryption of customer information in transit. Penalties reach $46,517 per violation per day. Law firms: ABA Model Rule 1.6(c) requires “reasonable efforts” to prevent unauthorized disclosure. ABA Formal Opinion 477R specifically addresses email, stating lawyers must assess sensitivity and use appropriate safeguards — which increasingly means encryption. Financial advisors: Yes. SEC, FINRA, and the GLBA all impose data protection obligations that include encryption of client information in transit.
Ready to Secure Your Firm’s Email?
We handle the setup, configuration, and ongoing management. Your team sends email — we make sure it’s encrypted.