Hybrid Split Domain - Microsoft 365 + StrataMail
Microsoft 365 Hybrid Routing with StrataMail
The problem: Every Microsoft 365 mailbox costs the same whether it belongs to a busy executive or a shared inbox that gets ten messages a month -- and those low-use licenses add up fast.
Hybrid routing keeps the users who need Microsoft 365 on it and moves the rest to lower-cost mailboxes, without changing your domain or your mail flow.
StrataMail's Hybrid Split Domain solution enhances Microsoft 365 with intelligent routing, flexible mailbox allocation, and unified security management. It enables your organization to keep essential or executive users on Microsoft 365 while routing standard and departmental accounts through StrataMail — reducing licensing costs and maintaining a consistent, unified domain identity across the entire company.
The StrataMail Routing Cloud sits between the internet and your mail servers, intelligently directing inbound and outbound email for abc.com users to the appropriate destination — Microsoft 365 or StrataMail. Each message flows through a common filtering and compliance layer that applies spam and malware protection, journaling, and delivery policies to ensure consistent governance and continuity.
This architecture lets organizations modernize at their own pace — supporting phased migrations, gradual user onboarding, or permanent hybrid operation. By balancing premium Microsoft 365 seats with StrataMail's scalable unlimited-user model, IT teams can achieve significant cost efficiencies while simplifying mail flow management and preserving enterprise-grade reliability.
- Unified domain identity across both Microsoft 365 and StrataMail mailboxes
- Policy-based routing for inbound and outbound mail traffic
- Centralized filtering, journaling, and compliance through StrataMail Routing Cloud
- Lower cost per user with secure and resilient hybrid architecture
- Ideal for phased migrations or long-term coexistence
