A client just emailed a signed engagement letter, or a full tax return. Now you wonder where that message sits, and who else could read it.

For a practice built on trust, that question matters more than the price of the plan.

Choosing an email host for a practice is a lot like choosing a filing cabinet for client files. The brand matters less than the lock, the label, and who holds the key.

This guide shows you the best email hosting for small law firms and accountants. 

Below, you will find what each provider does for client confidentiality, sign-in security, and record retention, plus what it really costs a small firm.

What Is Important When You Are Choosing

Law firms and accountants carry duties that ordinary businesses do not. Lawyers must make reasonable efforts to protect client information, and tax preparers fall under the FTC Safeguards Rule. Use this checklist to judge every option.

• Multi-factor authentication. The Safeguards Rule requires it for anyone accessing systems that hold customer data, email included.
• Encryption. Routine email is generally acceptable for lawyers, but ABA Opinion 477R says highly sensitive matters may call for encryption.
• Retention and legal hold. Firms facing disputes need to preserve email and prove nothing was deleted.
• Domain protection. SPF, DKIM, and DMARC stop criminals from sending fake emails in your firm’s name.
• Shared mailboxes and access controls. Staff should see only the client mail they are meant to see.
• Support and uptime. A missed deadline caused by an outage is a problem no discount can fix.

Quick Comparison

We checked each provider’s pages in October 2026, and all prices are in USD on annual billing. Confirm the final price at checkout, since offers change often.

Provider	Starting Price	Security Standout	Retention and Legal Hold	Best For
Truehost	From $4.80/year (1 mailbox); $44/year for 10	Anti-spam, anti-virus, SPF, DKIM, DMARC	Limited; pair with an archive tool	Solo and small practices on a budget
Google Workspace	$7/user/month (Starter)	Phishing filters and 2-step verification	Vault on Business Plus only ($22/user/month)	Firms already in Google tools
Microsoft 365	$7/user/month (Basic)	Threat protection and time-of-click link checks	Core eDiscovery and mailbox holds on Business Premium (about $22)	Firms living in Outlook, Word, Excel
Proton Mail	From $6.99/user/month	End-to-end, zero-access encryption	Limited	Highly sensitive matters
Rackspace Email	$10/mailbox/month	Premium spam and virus filtering	Archiving add-on (+$6)	Managed email with retention
Zoho Mail	Free for 5 users; from $1/user/month	TLS, 2FA, S/MIME on paid plans	Archiving and eDiscovery on Premium ($4)	Solo practitioners on a tight budget
Fastmail	From $3/user/month	Masked aliases, 2FA, no ads or tracking	Limited	Plain, fast, private email

1) Truehost

Truehost Workplace gives a small practice a branded address and solid baseline protection for very little money. Plans start at $4.80 a year, and ten mailboxes cost $44 a year.

That leaves a budget for the tools legal and tax work really need, such as a client portal and document management software.

Pricing: From $4.80 a year for one mailbox, rising to $88 a year for 20 mailboxes sharing 200GB

Want to compare every plan? View Truehost email hosting plans.

Features

• Block spam and malware. Anti-spam and anti-virus filtering screens mail before it reaches your inbox.
• Stop fake emails from your firm. SPF, DKIM, and DMARC support helps protect clients from spoofed messages.
• Stay online at deadlines. A 99.9% uptime guarantee and round-the-clock support keep mail flowing.

Pros

• Very low flat pricing that stays predictable as staff join
• Documents, spreadsheets, and drive storage included on every plan

Cons

• Does not advertise legal hold or end-to-end encryption, so send highly sensitive files through a secure client portal
• The 3GB entry plan is small for heavy attachment users

Best For: Solo practitioners and small firms that want reliable, low-cost email and use a separate portal for sensitive files

2) Google Workspace

Google Workspace puts Gmail’s phishing filters on your firm’s domain. Business Starter costs $7 per user monthly on annual billing, and Business Standard costs $14.

Retention and legal hold need Business Plus. That tier lists at $22 per user monthly and adds Google Vault.

Pricing: $7 per user a month (Starter), $14 (Standard), and $22 (Plus) on annual billing

Features

• Catch phishing early. Advanced filters screen incoming mail for phishing and malware.
• Enforce sign-in security. Two-step verification helps your firm meet multi-factor requirements.
• Preserve records. Vault adds retention rules, legal holds, search, and export on Business Plus.

Pros

• Strong, proven spam and phishing filtering
• Easy admin console that enforces security policies

Cons

• Vault is not included in Starter or Standard
• End-to-end encryption is not on by default

Best For: Firms already working in Docs, Drive, and Meet that need retention

3) Microsoft 365

Microsoft 365 runs email on Exchange Online and works smoothly with Outlook, Word, and Excel. Business Basic costs $7 per user monthly after the July 2026 increase.

Business Premium costs about $22 per user monthly. It adds core eDiscovery with mailbox holds.

Pricing: $7 per user a month for Business Basic, and about $22 for Business Premium

Features

• Block phishing and malware. Threat protection screens attachments and links in incoming mail.
• Place mailboxes on hold. Core eDiscovery lets you preserve and search mail for a matter.
• Work in familiar apps. Outlook, Word, and Excel are standard across law and accounting.

Pros

• Legal hold and eDiscovery available at the Premium tier
• Apps your clients and courts already use

Cons

• The compliance tools sit behind the pricier Premium plan
• The admin portal has a steeper learning curve

Best For: Firms that live in Outlook, Word, and Excel and need legal holds

4) Proton Mail

Proton Mail encrypts messages end to end, so even Proton cannot read them. That supports the stronger measures ethics opinions describe for highly sensitive client information.

Business plans support custom domains and PGP encryption. The company is based in Switzerland.

Pricing: From $6.99 per user a month on annual billing, with the Workspace plan at $12.99

Features

• Keep messages unreadable to outsiders. End-to-end and zero-access encryption protect stored email.
• Use your own domain. Custom domain support keeps your firm’s name on every message.
• Secure each login. Built-in two-factor authentication guards every account.

Pros

• The strongest privacy model on this list
• Helps answer client questionnaires that ask about encryption

Cons

• Higher price, with IMAP access needing the paid Bridge add-on
• Limited retention and legal hold tools

Best For: Boutique firms handling highly sensitive matters

5) Rackspace Email

Rackspace Email targets small businesses that want managed email backed by human support. Direct pricing is $10 per mailbox monthly after a 2026 pricing change.

Plans include 25GB mailboxes and premium spam and virus protection. An archiving add-on helps with retention.

Pricing: $10 per mailbox a month, with file storage (+$2) and archiving (+$6) as add-ons

Features

• Filter threats. Premium spam and virus protection is included on every plan.
• Get help at any hour. Round-the-clock support and free migrations ease the switch.
• Retain records. The archiving add-on stores mail for compliance and retention needs.

Pros

• Human support at every hour
• Archiving built for retention needs

Cons

• The priciest per-mailbox option on this list
• Fewer collaboration tools than Google or Microsoft

Best For: Mid-sized practices that want managed email and archiving

6) Zoho Mail

Zoho Mail offers ad-free email with solid security at a tiny price. A free plan covers up to five users, and paid plans start near $1 per user monthly.

Mail Premium costs $4 per user and adds 50GB of storage plus archiving and eDiscovery tools.

Pricing: Free for up to five users, then from about $1 per user a month

Features

• Protect messages in transit. SSL/TLS encryption covers connections, and paid plans support S/MIME.
• Secure every sign-in. Two-factor authentication through Zoho OneAuth guards accounts.
• Filter junk and threats. Spam and virus protection come standard.

Pros

• Very low cost for a real business mailbox
• Clean, ad-free interface

Cons

• The free plan has no IMAP or POP access, so Outlook cannot connect
• Entry storage is only 5GB per user

Best For: Solo practitioners watching every dollar

7) Fastmail

Fastmail sells fast, ad-free email with strict privacy policies. It does not track you or sell your data.

Business plans offer custom domains and masked email aliases. Business Standard costs $5 per user and gives you a 50GB mailbox.

Pricing: From $3 per user a month on annual billing, with Business Standard at $5

Features

• Keep data private. There are no ads, no tracking, and no data selling.
• Hide your real address. Masked aliases keep your main address out of sign-up forms.
• Add a second lock. Two-factor authentication protects every account.

Pros

• Fast, clean interface
• Strong privacy stance

Cons

• No end-to-end encryption
• No archiving, legal hold, or office suite

Best For: Small firms that want plain, fast, private email

Get Started Today

If you run a solo or small practice that mostly needs reliable, low-cost email, Truehost is the strongest starting point. Ten mailboxes cost about $44 a year there. 

The same team pays about $840 a year on Google Workspace Starter or Microsoft 365 Basic, and about $2,640 on the plans with legal hold.

If your firm must place legal holds, choose Google Workspace Business Plus or Microsoft 365 Business Premium. 

But if you handle highly sensitive matters, add Proton Mail or a secure client portal for the files that matter most.

Whichever you pick, turn on multi-factor authentication for every user and publish SPF, DKIM, and DMARC records on day one. 

This guide is general information, not legal advice, so check your state bar and IRS requirements.

Ready to protect your practice’s email? Get Truehost email hosting from $4.80 a year.