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Outlook / Microsoft 365 Integration

Same as Gmail. Outlook keeps human replies; automated outbound goes through your domain via Mailgun.

Email Connects via: DNS records on your Microsoft-hosted domain
Book a Demo How to connect

Microsoft 365 / Outlook works the same way as Gmail in our integration: we don't send through your Outlook mailbox. Microsoft's hosted email service isn't optimised for automated outbound and applies throttling/deliverability rules that don't fit AI follow-up sequences.

Instead, outbound automation goes through a Mailgun-authenticated sending subdomain on your business domain. Your team keeps using Outlook for human work, replies route back to our unified inbox, and follow-up sequences halt automatically when a human jumps in.

Popular workflow recipes

When this happens → do that
When
AI follow-up email sequence step
Then
Send via Mailgun + appear from [email protected]
When
Outlook user replies
Then
AI sequence pauses automatically
When
Customer marks Outlook reply 'not interested'
Then
Trigger 'closed-lost' AI tag on contact

Triggers & Actions

3 triggers · 3 actions
Triggers From Outlook / Microsoft 365 events that fire workflows
Reply received in Outlook

AI sequence halts; reply visible in both Outlook and unified inbox.

Microsoft user reports spam

Suppress contact from future sends.

Bounce / unsubscribe

Standard Mailgun-side handling.

Actions Into Outlook / Microsoft 365 what we do in the connected app
Send outbound as [email protected]

Routes through Mailgun-authenticated sending subdomain.

Keep Outlook untouched

Team keeps using Outlook for one-to-one human replies.

Route replies to Outlook + unified inbox

AI sequences pause when a teammate replies.

How to connect Outlook / Microsoft 365

~10 minutes
1
Pick a sending subdomain (e.g. mail.yourbusiness.com). This leaves your main MX records — the ones used by Microsoft 365 — completely untouched.
2
Follow the Mailgun setup: publish the four DNS records (SPF, DKIM, MX, tracking CNAME) for that subdomain at your DNS host.
3
Click Verify domain in the dashboard.
4
Workflow emails and AI follow-ups now send as your business address while Outlook keeps doing its normal job.
Good to know
  • Microsoft 365 mailbox API access is not used because Microsoft's per-mailbox sending rules are not designed for automated outbound at scale.

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