DO Mailbox
DO Mailbox: A domain-priced email service with strong administration and authentication features. Ranked #67 of 178 in Email Hosting by our editors (5.3/10); pricing: 14-day trial; best for domains needing email security and administration.
At a glance
- Editor score5.3 / 10
- Pricing14-day trial
- Best forDomains needing email security and administration
- Free planNo
- Paid from$96/yr
- Facts checked22 Sep 2026
Where it wins
- Unlimited mailboxes per domain across paid plans
- DMARC, SPF, DKIM, and AI phishing filtering
- Role-based administration, routing, API, and webhooks
Where it doesn't
- No free plan is available
- Storage is specified as a total plan quota, not per mailbox
- No mobile apps or client protocols are listed
Our verdict on DO Mailbox
DO Mailbox is a business email hosting service for companies, agencies, enterprises, and organizations managing custom domains. Its domain-based pricing includes unlimited mailboxes per domain, centralized administration, authentication with DMARC, SPF, and DKIM, AI-assisted spam and phishing filtering, catch-all addresses, routing rules, analytics, and API access on higher tiers. The service runs on the web and through an API, with a 14-day trial for evaluation.
The published plans scale by domain count and total storage. Starter costs $10 per domain per month or $96 per domain per year, with one custom domain, unlimited mailboxes, and 200 GB of total storage. Business costs $18 per domain per month or $172 per domain per year, adding three custom domains, 500 GB of total storage, advanced administration, DMARC aggregate reports, and live chat and email support. Pro costs $25 per domain per month or $240 per domain per year, with five custom domains, 1 TB of total storage, a dedicated IP address, forensic DMARC reports, and 24/7 priority phone support. Enterprise / Custom offers custom domain count, storage quota, dedicated infrastructure, a custom SLA, and priority onboarding.
Security and administration are the clearest reasons to consider DO Mailbox. Real-time dashboards, DMARC reporting, malware detection, phishing protection, role-based permissions, catch-all addresses, and routing rules support centralized domain management. Integrations include Microsoft 365, Google Workspace, Salesforce, Zapier, Okta, Slack, REST API, and webhooks. The service suits organizations that prioritize domain-level administration and authentication across multiple mailboxes. It is less suitable for teams seeking a free plan, mobile apps, or traditional client protocols, or for organizations that need storage quotas defined per mailbox.
Your product? Our editors can test DO Mailbox in depth and publish a review, labelled as paid · from $149/mo →
DO Mailbox pricing
All 4 DO Mailbox plans and prices →
DO Mailbox fact sheet
| Free plan | No |
|---|---|
| Paid from | $96/yr |
| Storage per mailbox | Not verified |
| Email aliases | Not verified |
| Attachment limit | Not verified |
| IMAP/POP support | Not verified |
| Mobile app access | Not verified |
| Calendar included | Not verified |
| Migration tools | Yes |
| Free trial | 14 days · no card needed |
| Deployment | Cloud |
| Platforms | Web |
| Compliance & security | GDPR, SOC 2, SSO/SAML, 2FA |
| Support | Email, Live chat, Phone · 24/7 |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 5,000+ integrations: Microsoft 365, Google Workspace, Salesforce, Zapier, Okta, Slack … |
| Pricing | 14-day trial (source) |
| Website | do-mailbox.com |
| Facts checked | 22 Sep 2026 |
DO Mailbox integrations
DO Mailbox lists 5,000+ integrations on its own site — the 8 named here are the ones its pages call out.
- Microsoft 365
- Google Workspace
- Salesforce
- Zapier
- Okta
- Slack
- REST API
- Webhooks
Alternatives to DO Mailbox
- Zoho MailA flexible business email suite with a free plan, low-cost entry tier, and migration support.9.4
- Microsoft Exchange OnlineA deep Exchange service for organizations centered on Outlook and administration.9.2
- Google WorkspaceA full Gmail-based collaboration suite for organizations that need more than email.9.1
See all DO Mailbox alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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