Email Warmup for Microsoft 365 Business
Connect your Microsoft 365 Integration mailbox to WarmySender and build the sender reputation that lands cold email in the inbox — with warmup, campaigns, and multichannel outreach on autopilot.
- Works with all Microsoft 365 plans
- Azure AD authentication
- Enterprise admin controls
- Bulk mailbox management
- Custom domain support
- Unlimited organization mailboxes
Key takeaways
- Can our IT admin approve WarmySender for everyone? Yes. Azure AD admins can grant organization-wide consent, allowing all users to connect without individual approval.
- Is this compatible with our security policies? WarmySender uses Microsoft's standard OAuth flow and doesn't require any security exceptions.
- Do you support hybrid Exchange deployments? WarmySender supports Exchange Online mailboxes.
Microsoft 365 Email Warmup
Microsoft 365 powers enterprise email for organizations worldwide. But even with Microsoft's infrastructure, sender reputation matters. WarmySender provides enterprise-grade warmup for your Microsoft 365 organization, ensuring your business emails reach their destination.
Azure AD Integration
WarmySender integrates with Azure Active Directory for enterprise authentication:
- Admin consent flow for organization-wide approval
- Individual user consent when admin pre-approval isn't configured
- Conditional access policy compatible
- Single sign-on ready
Admin Capabilities
Organization Dashboard
View warmup status for all organization mailboxes. Filter by department, status, or health score.
Policy Management
Define default warmup strategies for new connections. Set volume limits aligned with your organization's needs.
User Provisioning
Connect mailboxes in bulk during team onboarding. Remove access instantly when users leave.
Enterprise Security
- OAuth 2.0 authentication via Microsoft
- No passwords stored
- Encrypted token storage
- Audit trail of all warmup activity
- Compliant with enterprise security requirements
Microsoft 365 Plan Support
WarmySender works with:
- Microsoft 365 Business Basic
- Microsoft 365 Business Standard
- Microsoft 365 Business Premium
- Microsoft 365 E3 / E5
- Exchange Online (standalone)
How to connect Microsoft 365 Integration
- Azure AD Approval
Admin approves WarmySender in Azure Active Directory - User Connection
Users connect mailboxes via Microsoft OAuth - Configure Policies
Set organization warmup policies - Central Monitoring
Track all mailboxes from admin dashboard
What you get
- Automated warmup emails sent around the clock
- Real engagement from genuine, verified mailboxes
- Spam-folder detection and automatic rescue
- Detailed deliverability and inbox-placement analytics
- Manage multiple mailboxes from one dashboard
- Fully hands-off — no manual sending required
Frequently asked questions
Can our IT admin approve WarmySender for everyone?
Yes. Azure AD admins can grant organization-wide consent, allowing all users to connect without individual approval.
Is this compatible with our security policies?
WarmySender uses Microsoft's standard OAuth flow and doesn't require any security exceptions. It works with conditional access and MFA.
Do you support hybrid Exchange deployments?
WarmySender supports Exchange Online mailboxes. On-premises Exchange can be connected via SMTP/IMAP if synced to the cloud.
What Microsoft 365 permissions does WarmySender need?
WarmySender requests mail.send and mail.read permissions to send warmup emails and monitor inbox activity.