Mailbox provider
Microsoft 365
Microsoft 365 is a mailbox provider. Type any domain below to see if its email runs through Microsoft 365.
Provider profile
Microsoft 365
Microsoft 365 is a mailbox provider. Its mail servers' hostnames end in .mail.protection.outlook.com, .outlook.com, .office365.com.
What is a mailbox provider?
A mailbox provider runs the inboxes where people read and send mail. Domains that point their MX records here have their email hosted directly by this service.
MX hostname patterns
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.mail.protection.outlook.com - ·
.outlook.com - ·
.office365.com
Other mailbox providers
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