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Business Email and Document Management: Security and Control

Business Email & Documents

Our guides on choosing business email, SPF/DKIM/DMARC, phishing, invoice fraud, file permissions and version control, gathered into one reading path.

A company's most valuable correspondence and documents live in two places: mailboxes and file folders. Quotes, invoices, contracts and payment instructions all pass through them, which is exactly why attackers target them. According to the FBI IC3 2025 Internet Crime Report, 24,768 business email compromise (BEC) complaints in the US reported total losses of $3.05 billion in 2025. Disorder has a quieter cost as well: Atlassian's State of Teams 2025 survey found that teams waste 25% of their time just searching for answers.

This hub gathers our articles on business email and document management into a path that runs from the basics to a buying decision. Begin with the eight criteria in how to choose a business email service, then protect your domain with our SPF, DKIM and DMARC explainer. Next, tackle two everyday team problems: shared mailbox management ends password sharing, and an email approval workflow stops unapproved messages going out in the company's name.

To recognise the threats, our articles on how to spot phishing emails, lookalike domain attacks and, for finance teams in particular, bank detail change email fraud form the core of the deeper reading. On the document side, what document management is, file sharing permissions and document version control walk you from a chaotic shared drive to an orderly document store.

When you are ready to act, see our pages on cyber security consultancy, document management systems and data protection compliance. Smart360, our product family that brings SmartMail and SmartFiles together under one panel and one identity, applies the principles in these guides (approval workflows, inbound email assessment, a permissions matrix and full version history) in a single place.

Reading list by scenario and sector

  • Payment and bid security: fake invoice email scams, email fraud in logistics and tender email security.
  • Identity, access and compliance: single sign-on (SSO), offboarding email access and email archiving and data protection.
  • Document-heavy professions: document management for accounting firms, document management for law firms and AI document analysis.
Start here

How to Choose a Business Email Service: An 8-Point Checklist for Security, Permissions and Cost

Choosing a business email service is about more than mailbox size. An 8-point checklist covering security, shared mailboxes, approvals and data location.

Read the guide

All guides in this topic (4)

Questions we hear most often

Frequently Asked Questions

What matters most when choosing a business email service?

There is no single criterion, but security and permission management should come before price. Weigh up how inbound mail is authenticated and assessed, per-person permissions on shared mailboxes, approval workflows, how quickly a leaver's access can be removed, and archiving needs. Then calculate cost across mailbox numbers, storage and the effort of day-to-day administration.

Does setting up SPF, DKIM and DMARC stop all fake emails?

No. These records make it much harder for criminals to send email pretending to be your domain. They do not stop messages from lookalike domains that differ by a single character, or from genuine accounts that have been compromised. You still need inbound email assessed against several signals, payment instructions confirmed through a second channel, and trained staff.

How is document management different from a shared drive?

A shared drive simply stores files. Document management controls who can view, edit and delete each item separately, keeps every upload with the same name as a new version, and logs who did what. Documents that are overwritten or deleted by mistake can be restored, and access becomes something you can actually audit and demonstrate.

How long should business emails be kept?

There is no single retention period. Tax, commercial and employment record-keeping obligations have to be balanced against the data protection principle of keeping personal data only as long as necessary. In practice, organisations set retention periods by type of correspondence in a written policy, delete or anonymise expired records, and restrict archive access to authorised staff.

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