Both products let an AI agent read and act on Outlook mail. Microsoft's Work IQ MCP is a remote server with 12 generic tools that call Microsoft Graph paths across mail, calendar, files, Teams, and people. Fluxmail gives agents dedicated email tools for Outlook, Exchange, Gmail, and IMAP.
Choose Fluxmail when the agent needs ready-made email tools, per-client permissions, personal Outlook.com accounts, or mailboxes outside Microsoft 365. Choose Work IQ MCP when your organization is on Microsoft 365 and the agent also needs calendar, Teams, SharePoint, or OneDrive data.
Feature comparison
Feature
Fluxmail
Work IQ MCP
Product and deployment
Deployment
Cloud or self-hosted
Hosted by Fluxmail, or a local process or Docker
Microsoft-hosted remote endpoint
A local MCP server is also available through the Work IQ CLI
Email providers
Gmail, Outlook, Exchange, and IMAP
Microsoft 365
Personal Outlook.com accounts
Yes, self-hosted
Includes Hotmail addresses when your Entra app allows personal accounts
Not documented
Setup is described for Microsoft 365 tenants
Interfaces
MCP, REST API, and CLI
The CLI is self-hosted only
MCP, REST API, and A2A
Data beyond email
Email only
Calendar, files, Teams, people, Planner, and sites
Email work
Tool design
Dedicated email tools
Such as list_emails, send_email, and forward_email
12 generic tools
The agent calls Microsoft Graph resource paths
Send and reply
Yes, when mail.send is allowed
Direct send, draft send, reply, and reply-all
Blocked by default
An administrator must allow mutations in tenant policy
Scheduled sending
Yes
Waits as a draft in the mailbox, and you can cancel it
Not documented
Attachment downloads
Dedicated tool
Inline content or a resource link, with PDF text; 10 MB default limit
Generic binary fetch tool
4 MB default limit; mail attachment paths not documented
Large result sets
Page tokens on list and search tools
25 results by default, 100 at most
$skip and $skiptoken are blocked
Control and cost
Agent permissions
Read-only, read-write, full, or custom
Set per connection or API key, plus member and mailbox scope
Tenant-level policy
Per-user, per-app, and per-agent policies are not in the initial release
Mailbox scope
Member grants and per-connection mailbox lists
Signed-in user's Microsoft 365 permissions
Sensitivity labels and compliance policies apply
Where email data goes
Through Fluxmail Cloud, or directly from your host
Cloud does not store messages or attachments
Through Microsoft
Mail stays within Microsoft 365 services
Setup
Sign in with Microsoft in Cloud
Self-hosted needs your own Entra app registration. In either edition, an admin may need to grant consent
Global Administrator enables Work IQ once
Requires a usage-based billing plan with an Azure subscription
Pricing
Free self-hosted plan; Pro $15/month; Business $25/member/month
Same Pro and Business prices in Cloud and self-hosted. Annual: Pro $120; Business $240/member
Usage-based, billed in Copilot Credits
No fixed per-call MCP price listed
A closer look
Fluxmail gives agents email tools instead of Graph paths
Work IQ MCP keeps its tool list to 12 generic tools such as fetch, create_entity, and do_action. To send a message, the agent calls do_action on a Graph path like /me/sendMail, and it can look up schemas at runtime with get_schema and search_paths.
Fluxmail exposes one tool per email task, including search, threads, drafts, send, reply, forward, attachment downloads, and inbox organization, plus scheduled sending. Replies and forwards derive recipients, subjects, and threading from the original message, so the agent does not need to know Graph request bodies.
Fluxmail works beyond Microsoft 365
Work IQ MCP is built for Microsoft 365 tenants. It reaches more than mail, including calendar, files, Teams, people, and SharePoint sites, which helps when an agent works across all of them.
Fluxmail focuses on email and uses the same tools for Microsoft 365, personal Outlook.com and Hotmail accounts, Gmail, and IMAP mailboxes. On-premises Exchange servers without Graph access can connect through IMAP and SMTP; in Cloud, the server needs a public hostname and a valid TLS certificate. The same agent or backend can work across providers through MCP or REST.
Who runs the connection and who controls access
Microsoft operates Work IQ MCP, so requests run through Microsoft services. Access follows the signed-in user's Microsoft 365 permissions, and write operations stay blocked until an administrator changes tenant policy. In the initial release, that policy applies to the whole tenant rather than to individual apps or agents.
Fluxmail sets permissions per connection instead of per tenant, so each agent gets its own permissions and mailbox list. Fluxmail Cloud runs the server and doesn't store messages or attachments. Self-hosted Fluxmail keeps Microsoft OAuth tokens and its database on infrastructure you control. Your MCP client may send retrieved email to its model provider, and that provider's data policies apply.
Which should you choose?
Best choice
Fluxmail
You need Outlook, Exchange, Gmail, or IMAP behind one tool set.
You want to connect personal Outlook.com or Hotmail accounts with self-hosted Fluxmail.
The agent must send, forward, schedule sends, or download attachments without writing Graph requests.
Each client needs its own permissions or mailbox access.
You want to self-host email access on infrastructure you control.
Work IQ MCP
Every mailbox in the workflow is in your Microsoft 365 tenant.
The agent also needs calendar, Teams, SharePoint, or OneDrive data.
You prefer a Microsoft-operated endpoint billed through Copilot Credits.
Common questions
Can Work IQ MCP send Outlook email?
Yes, through the do_action tool on a Graph path such as /me/sendMail. Microsoft blocks create, update, delete, and action requests by default, so a tenant administrator must allow them in the Microsoft 365 admin center first. Fluxmail can send, reply, or forward when the connection has mail.send permission, and it can also schedule delivery.
Does Work IQ MCP work with personal Outlook.com accounts?
Microsoft's Work IQ documentation does not cover personal Outlook.com accounts. Its setup steps assume a Microsoft 365 tenant with a Global Administrator and usage-based billing. Self-hosted Fluxmail supports Microsoft 365, Outlook.com, and Hotmail through Microsoft Graph when your Entra app allows personal accounts.
Which one is easier to maintain?
Microsoft runs the Work IQ endpoint and Fluxmail runs Fluxmail Cloud, so neither needs a server from you once the tenant or mailbox is connected. Self-hosted Fluxmail runs locally or in Docker, which gives you the data path and leaves updates and uptime to you.
Sources
We reviewed the linked product docs on November 4, 2026.
