Correspondence as defensible evidence

The email a compliance officer can defend.

RegNexus Mail authenticates every sender, seals every important message into a tamper-evident Trust Ledger, and files it to a matter under the right retention floor — SRA, FCA, ICAEW and more, built in. When anyone asks “show me,” you export the proof.

If anyone ever asks, what can you actually prove about this message?

Received & hashed Sender authenticated (SPF/DKIM/DMARC) Sealed into Trust Ledger Filed to a matter, retention inherited.
Communication Record · MSG-48291
REGULATORYDEADLINE
SR
Solicitors Regulation Authority
supervision@sra.org.uk
Request for information — file review, matter reference M-2231

Further to our supervisory engagement, please provide the complete correspondence record for the above matter, including evidence of receipt and authenticity, within 14 days of the date of this letter…

Received 2026-08-05 09:14:22 UTC · sha256:…9f2c1a
Chain of custody
Received & Hashed
09:14:22 · sha256:…9f2c1a
Sender Authenticated
SPF pass · DKIM pass · DMARC pass
Sealed into Trust Ledger
block #48291 · chain intact
Filed to Matter
Unfiled — locked out of archive
For every business, not only regulated firms

Every business has correspondence it can't afford to lose, misfile, or fail to prove — client emails, supplier invoices, contracts, sign-offs and approvals. RegNexus Mail turns all of it into organised, provable records.

Purpose-built for regulated firms — and a serious upgrade for any business that treats its email as records worth keeping. Regulated firms are simply the most demanding case; everything that protects them protects you too.

Professional servicesAgencies & consultanciesConstruction & tradesE-commerce & retailPropertyHealthcareLaw · Accountancy · FinancialAny growing SME
The standard of proof

Nobody asks if you replied. They ask if you can prove it.

When correspondence is examined — by a client, a supplier, an insurer, a court, or a regulator like the SRA, the FCA, an ICAEW monitor or the Bank of Ghana — four questions decide whether it stands up. Standard email answers none of them.

A copy proves nothing
  • It can be edited after the fact
  • It can be back-dated or reconstructed
  • Its sender can be disputed
  • Nothing guarantees it still exists when needed
A Communication Record proves everything
  • SHA-256 hashed on receipt — alteration breaks the chain
  • Sealed with a timestamped block number
  • Sender authenticated at receipt (SPF/DKIM/DMARC)
  • Retained under the right floor for your business, automatically

Is it authentic?

Did this message really come from who it claims? RegNexus Mail authenticates every sender at receipt and records the result on the Communication Record.

spf=pass · dkim=pass · dmarc=pass

Is it unaltered?

Could anyone have changed it since? Every message is SHA-256 hashed and sealed into a hash-chained Trust Ledger. Tamper with block N and the chain breaks from N forward — provably.

sha256=…9f2c · block #48291 sealed

Is it on the record?

Is it filed where it belongs? Every important message is filed to a matter, or wears a magenta “Needs filing” badge until it is. Nothing important stays loose.

state=NEEDS_FILING → filed M-2231

Is it retained lawfully?

Will it still exist when it's needed? Filed messages inherit the right retention floor automatically — 6 years SRA/FCA/ICAEW, 5 years fintech, a sensible default for everyone else.

retention=6yr SRA · inherited

Outlook and Workspace deliver mail. They were never built to answer these.

SRAFCAICAEWBank of GhanaSEC GhanaCBNGLCICAG
The evidence pipeline

Six steps. Every important message. Automatically.

Good record-keeping fails when it depends on someone remembering. RegNexus Mail turns the discipline into a pipeline every important message runs through — no checklist, no chase.

Automatic · systemYou · one stepAutomatic · system
Receive
01 · hashed
Message arrives and is SHA-256 hashed on the spot.
Understand
02 · obligation
RegNexus Triage classifies by business obligation — deterministic, no LLM.
REGULATORY
Act
03 · reply
Reply or action the message.
Reply-gate: advisory second-review on regulatory mail — never blocking.
File
04 · you
Assign to a matter — or it keeps its magenta “Needs filing” badge and stays out of the archive.
Seal
05 · ledger
Filed messages are locked into the Trust Ledger with cryptographic proof.
Retain
06 · schedule
The matter's retention schedule applies, under your sector and jurisdiction.

The only step a person takes is filing. The evidence takes care of itself.

Ordinary inbox 312 unread
Client A Re: your enquiry…
Newsletter Weekly digest…
FCA Notice of information request…
Supplier Invoice attached…
…everything looks the same.
RegNexus Triage obligation-first
4 REGULATORY2 DEADLINE · due this week7 Needs filing
REGULATORY FCA Information request
DEADLINE SRA File review — 14 days
FINANCIAL Supplier Invoice £4,200
Trust Ledger · SHA-256 hash-chained

Tamper with one message, and the chain tells on it.

Every sealed message is written to a block, hash-chained to the block before it. Change any byte of a sealed message and every block from that point forward is invalidated — provably, publicly, in seconds. Try it.

Client-facing — no hidden audit log
block #48289
sha256:…a1b2c3
✓ sealed
block #48290
sha256:…d4e5f6
✓ sealed
block #48291
sha256:…9f2c1a
✓ sealed
block #48292
sha256:…77b0e9
✓ sealed
block #48293
sha256:…c0ffee
✓ sealed
CHAIN INTACT · 5 blocks verified · every message provably authentic and unaltered
Sector + jurisdiction packs

The system knows your rules. So retention is never a decision.

When you file a message, RegNexus Mail already knows whether you're UK SRA-regulated law, an ICAEW practice, an FCA advisory, a general business, or a Ghanaian accountancy firm — and applies the correct retention floor automatically. Set a hold or a deadline on a matter once, and every message filed to it inherits the policy. No spreadsheet. No “we think it's six years.”

Matter M-2231
Estate of A. Whitfield · SRA-regulated
Retention floor6yr · SRA · inherited
Participants4 authenticated
ReferenceM-2231 / 2026
Legal hold Active — deletion frozen
Messages filed18 · all inherit 6yr
Regulator · jurisdictionRetentionBuilt-in
SRA
UK · law
6 yrs
FCA
UK · financial
6 yrs
ICAEW
UK · accountancy
6 yrs
Fintech
UK · Bank of Ghana · CBN
5 yrs
General business
GDPR cross-sector floor
7 yrs

Hold a matter during a dispute or investigation and deletion is frozen across every message filed to it — legal hold is matter-linked, not a manual sweep.

Export the proof

“Show me.” — Two words you're now ready for.

When a client, a supplier, a regulator, or a court asks you to substantiate correspondence, you don't reconstruct it. You export it.

Certificate of Receipt & Authenticity

Downloadable proof of receipt for a single message
Verification IDRNX-8F29-4C1D-A0B6
MessageMSG-48291
Received2026-08-05 09:14:22 UTC
Sender authSPF · DKIM · DMARC pass
Sealed block#48291
sha256:9f2c1a3e77b0e94d8a2f6c0b15de
4471aa93c8e102f7b6d4550f9c2c…
CHAIN INTACT · sealed & verified
Public verification page
Verification ID: RNX-8F29-4C1D-A0B6
Verified · Authentic · Unaltered
Confirmed against SHA-256 hash — provable to an outside party, not just an internal log.
Evidence bundle
Exportable pack for a whole matter — ready for a client, submission or dispute.
Legal hold & DSAR
Governance adds legal hold and DSAR response from the matters where data lives.
Verification ID: RNX-8F29-… · sha256:…9f2c · CHAIN INTACT
One codebase · UK · Ghana · Nigeria · Kenya

Your sector's vocabulary. Your jurisdiction's law. One codebase.

A matter in law is an engagement in accountancy, a case in financial advisory, and a project in any other business — and the regulator, the AML body, the data-protection law, the currency and the retention floor all differ by country. RegNexus Mail carries that knowledge as data, not as forked code. Nothing is white-labelled or bolted on.

Sector · record noun
United Kingdom
Ghana
Nigeria
Kenya
Law
“matter”
SRA · 6yr
GLC
NBA
LSK
Accountancy
“engagement”
ICAEW · 6yr
ICAG
ICPN
ICPAK
Financial advisory
“case”
FCA · 6yr
SEC GH
SEC NG
CMA
General business & SMEs
“project”
GDPR · 7yr
DPA 2012
NDPA
DPA 2019
Professional servicesAgencies & consultanciesConstruction & tradesE-commerce & retailProperty & lettingsHealthcareAny growing SME
UK United Kingdom
Regulators SRA · FCA · ICAEW
AML NCA / HMRC
Data law UK GDPR · Currency GBP £
GH Ghana
Regulators GLC · ICAG · SEC · BoG
AML FIC
Data law DPA 2012 · Currency GHS ₵
NG Nigeria
Regulators NBA · ICPN · SEC · CBN
AML NFIU
Data law NDPA · Currency NGN ₦
KE Kenya
Regulators LSK · ICPAK · CMA · CBK
AML FRC
Data law DPA 2019 · Currency KES

Whether you're a two-person shop in Accra or a fifty-partner firm in London, the platform already speaks your obligations.

The evidence, in numbers

Correspondence that answers before it's asked.

SHA-256
Hash-chained Trust Ledger — tamper-evident by construction
4 countries
UK · Ghana · Nigeria · Kenya on one data-driven codebase
6 yrs
SRA / FCA / ICAEW retention floor applied automatically
0 LLM
RegNexus Triage is deterministic — obligation-first, not guesswork
Why demanding teams move
“Our old inbox could show a copy. RegNexus Mail shows a sealed, authenticated record with the retention floor already applied. The difference between an inbox and a record is the difference between hoping and proving.”
MD
Compliance Partner · UK SRA-regulated firm
1–50 partners · illustrative of target buyer
Plans

Priced as evidence infrastructure, not mailboxes.

Sector and jurisdiction packs are included on every plan — the platform applies the right rules for your business from day one.

Evidence infrastructure
Professional
The Communication Record on every mailbox — the artifact you can defend.
  • Communication Record — visible three-part evidence trail
  • RegNexus Triage — obligation-first classification
  • Trust Ledger sealing — SHA-256 hash-chained
  • Matter filing with sector retention inherited
  • Transmission attestation & public verification
Sector + jurisdiction packs included
Supervision tooling
Governance
Everything in Professional, plus the tooling for firms that answer to a monitor.
  • Everything in Professional
  • Legal hold — freeze matters during investigation
  • DSAR response — from the matters where data lives
  • Evidence bundles for regulatory submission
  • Supervision & reply-gate controls for multi-person teams
Sector + jurisdiction packs included

The next time anyone asks, let the answer already exist.

See a real Communication Record, follow one message from receipt to sealed evidence, and verify it yourself on the public page.

Talk to us about supervision & DSAR →
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