What is the mail server for outlook 365

The mail server for Outlook 365 depends on the specific configuration and setup of your organization. However, here are some general guidelines:

For Outlook 365 with Microsoft 365 or Office 365

• The mail server for Outlook 365 with Microsoft 365 or Office 365 is typically one of the following:
  • outlook.office365.com (for Exchange Online)
  • outlook.office365.com (for Exchange Online Plan 1)
  • outlook.office365.com (for Exchange Online Plan 2)
• The mail server for Outlook 365 with Microsoft 365 or Office 365 may also be configured to use a specific domain-specific mail server, such as yourdomain.onmicrosoft.com (e.g., example.onmicrosoft.com).

For Outlook 365 with a custom domain

• If you have a custom domain (e.g., example.com) and are using Outlook 365 with Exchange Online, the mail server may be:
  • yourdomain-com.mail.protection.outlook.com (e.g., example.com.mail.protection.outlook.com)
• If you have a custom domain and are using Outlook 365 with a third-party email hosting service, the mail server may be specific to that service.

For Outlook 365 with a hybrid setup

• If you have a hybrid setup where you're using both Exchange Online and an on-premises Exchange server, the mail server may be:
  • yourdomain-com.mail.protection.outlook.com (e.g., example.com.mail.protection.outlook.com) for Exchange Online
  • your on-premises Exchange server (e.g., exchange.yourdomain.com) for on-premises Exchange

Keep in mind that these are general guidelines, and the specific mail server for your Outlook 365 setup may vary depending on your organization's configuration and setup. If you're unsure about the mail server for your Outlook 365 setup, you can contact your IT administrator or Microsoft support for assistance.