Question 1

What's the difference between Outlook and Hotmail?

Accepted Answer

Outlook.com replaced Hotmail as Microsoft's email service, but @hotmail.com addresses still work. All Hotmail accounts were migrated to Outlook infrastructure. Both use the same mail servers and verification process.

Question 2

Can you verify Microsoft 365 business emails?

Accepted Answer

Yes. Microsoft 365 business accounts often use @outlook.com or custom domains. Our checker validates Microsoft-hosted email addresses. For custom domains on Microsoft 365, we verify MX records point to Microsoft servers.

Question 3

Why do Outlook SMTP checks sometimes timeout?

Accepted Answer

Microsoft implements strict rate limiting and anti-abuse measures on their SMTP servers. Outlook may delay or refuse external verification attempts to protect user privacy. Our checker handles this gracefully with DNS/MX fallback validation.

Question 4

Are old @msn.com addresses still valid?

Accepted Answer

Yes, @msn.com email addresses are still active and route through Microsoft's email infrastructure. Our checker validates these legacy addresses along with modern Outlook and Hotmail domains.

Question 5

Does Outlook support email aliases?

Accepted Answer

Yes, Outlook allows alias creation through account settings, but doesn't use plus addressing like Gmail. Aliases are separate addresses that route to the same inbox. Our checker validates each address independently.

Question 6

How do I verify @outlook.com vs @hotmail.com?

Accepted Answer

Both domains use identical validation rules and Microsoft mail servers. Our checker automatically detects which domain is being verified and applies the appropriate validation logic for Microsoft email services.

Question 7

Can Outlook addresses have dots?

Accepted Answer

Yes, Outlook allows dots in email addresses. Unlike Gmail, dots are significant in Outlook - john.doe@outlook.com is different from johndoe@outlook.com. Our checker validates proper dot usage.

Question 8

Why do some Outlook verifications take longer?

Accepted Answer

Microsoft implements aggressive rate limiting on SMTP verification to protect against abuse. When we detect rate limiting, we use alternative validation methods (DNS/MX) which are equally reliable but may take a few extra seconds.

Question 9

Can you verify Microsoft 365 shared mailboxes?

Accepted Answer

Yes, our checker validates Microsoft 365 shared mailboxes and distribution lists. However, catch-all domains may show as 'risky' since they accept emails to any address, making verification less definitive.

Question 10

What about Outlook.com regional domains?

Accepted Answer

We support all Outlook regional variants including @outlook.co.uk, @outlook.de, @hotmail.co.uk, and more. Our checker automatically recognizes and validates all Microsoft email domains worldwide.

Outlook Email Checker - Verify Microsoft Email Addresses

Why Validate Microsoft Email Addresses

All Microsoft Domains

Business & Personal

Reduce Microsoft Bounces

Handle Rate Limiting

Microsoft Email Validation Process

Microsoft Format Check

Microsoft Server Verification

Mailbox Existence Check

Outlook Checker FAQs

Related Email Validation Tools

Gmail Email Checker

Email Verifier

SMTP Validation