Microsoft Outlook email verification with BillionVerify
Microsoft Outlook is one of the world's most widely used email and calendar platforms, used by businesses to manage communication, scheduling, and contacts. Integrating BillionVerify with Outlook lets you validate email addresses before sending campaigns or storing contacts, keeping your inbox reputation intact.
Why verify before the send
Sending from Outlook to unverified addresses risks bounces that hurt your domain's deliverability score and may trigger spam filters. BillionVerify verifies each address in advance, flagging invalid mailboxes, disposable services, role accounts, and catch-all domains so only legitimate recipients receive your messages.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Microsoft Outlook sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key. Adapted from this n8n template
Workflow templates with Microsoft Outlook
Ready-to-use workflows that verify emails before Microsoft Outlook sends.
How it works
- 1
Connect Microsoft Outlook and BillionVerify in n8n using the community node, or activate the integration in Integrately with a single click.
- 2
Define a trigger — a new contact, an incoming form submission forwarded to Outlook, or a scheduled list pull.
- 3
Send each email address to BillionVerify for real-time validation against syntax, DNS, and SMTP checks.
- 4
Receive a verdict for every address: valid, invalid, disposable, role-based, or catch-all.
- 5
Store only verified addresses in Outlook contacts or pass them to your email sending tool with confidence.
When to use this
Verify contacts before adding to Outlook
When new contacts are added to your Outlook address book from web forms or CRM imports, route them through BillionVerify first. Only confirmed, deliverable addresses get saved — keeping your contact list clean long-term.
Pre-send validation for bulk outreach
Before triggering a bulk email sequence through Outlook, run the recipient list through BillionVerify. Remove bad addresses to reduce bounce rates and protect your Microsoft 365 sending reputation.
Qualify inbound email inquiries
When prospects contact you via web forms that feed into Outlook, verify their email address automatically. Discard disposable or fake addresses so your sales team only follows up with genuine leads.
FAQ
Will verifying addresses affect my Outlook sending limits?
No. Verification happens before sending — BillionVerify checks addresses via its own infrastructure, so your Outlook sending quota is untouched.
Can I use BillionVerify with Microsoft 365 shared mailboxes?
Yes. The integration works at the workflow level, so it applies regardless of whether you use a personal Outlook account or a Microsoft 365 shared mailbox.
How do catch-all domains affect deliverability in Outlook?
Catch-all domains accept any address at the SMTP level, so you cannot know if a specific mailbox exists without sending. BillionVerify flags these so you can decide whether to include or exclude them based on your risk tolerance.
Verify emails in Microsoft Outlook
Create a free account, grab your API key, and stop bounces before they happen.
Get started free