To configure your device or application, connect directly to Microsoft 365 or Office 365 using the SMTP AUTH client submission endpoint smtp.office365.com. Each device or application must be able to authenticate with Microsoft 365 or Office 365.
Since Office 365 is a suite of tools, you’ll use Microsoft Outlook — the email client in MS Office — to edit your account settings. In addition to teaching you how to set up the SMTP server on Outlook.com, I’ll also tell you how you can set up POP and IMAP too.
If you want to manually add another email account to Outlook, you may need to use advanced setup. ...
To configure your device or application, connect directly to Office 365 using the SMTP client ...
Office 365 SMTP settings. Server Address: smtp.office365.com. Username: Your Office 365 Address (e.g. email@example.com) Password: Your Office 365 Password. Port Number: 587 (With TLS) Authentication: Required. Sending Limits: 10,000 Emails a day. To know more about Office 365 SMTP settings, Click here.
The Office 365 Exchange Server can be configured to allow SMTP Relay for specific IP addresses. This eliminates the need for a specific user name and password login. For a fixed location like an office or web site, a specific IP address or set of IP addresses can be allowed to use the SMTP server.
There are two settings that can help you do this: An organization-wide setting to disable (or enable) SMTP AUTH. A per-mailbox setting that overrides the tenant-wide setting. Note that these settings only apply to mailboxes that are hosted in Exchange Online (Office 365 or Microsoft 365).
Office 365 SMTP Settings. With the settings above you will have a sending limit of 10,000 emails per day and 30 messages per minute. Which should be more than efficient for most use cases.