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Microsoft 365 + ColdSend
Connect Microsoft 365 and Outlook mailboxes to ColdSend. Send cold emails through your own Microsoft Entra OAuth app or ColdSend's shared infrastructure with native reply tracking.
Inbox ProviderOAuthUpdated Aug 15, 2026
What you get with Microsoft 365
Send from your existing mailboxesUse the Outlook and Microsoft 365 accounts your team already has. No need to buy new inboxes or migrate data.
Flexible OAuth optionsConnect through ColdSend's shared Microsoft app in one click, or bring your own Microsoft Entra app for full control over credentials and permissions.
Native reply trackingReplies land in ColdSend's unified inbox. You see interested leads, unsubscribe requests, and bounces in one place.
No per-mailbox feesMicrosoft 365 accounts count toward your plan's sender limit with no extra per-inbox charge from ColdSend.
Setup in 3 steps
1
Add Microsoft 365 as a sender accountIn ColdSend, go to Sender Accounts and choose Microsoft 365. This tells the platform you want to send from Outlook addresses.
2
Authorize via OAuthPick ColdSend's shared Microsoft app for instant setup, or connect your private Microsoft Entra app if your security team requires it.
3
Launch your campaignSelect your connected Microsoft 365 inboxes, upload leads, set your schedule, and start sending. Replies and bounces sync automatically.
