If you're encountering difficulties dispatching emails, it might be imperative to revise your SMTP server configurations, which govern the outbound mail servers. This guide will elucidate the process of pinpointing your SMTP server settings within Outlook 365.
Procedures

Launch Outlook 365. You can find this application in your Start menu (for Windows) or within the Applications folder of Finder (for Mac).

Access the File tab and click Info
(Exclusive to Windows). Situated in the top left corner of the application interface.
- For Mac users, navigate to Preferences > Accounts instead.

Opt for the Account Settings option. Additional choices will emerge.

Select Manage profiles. A dialog box will appear.

Hit Email accounts. This action will launch the 'Account Settings' window.

Tap the Email tab. Situated at the top alongside Data Files and Address Books.

Double-click the desired email address. Doing so will open another window.
- You'll find your SMTP server listed under 'Server Information.' If further details are needed, you can click More Settings > Advanced.
- Typically, the SMTP host name resembles 'smtp.yourprovider.com.' Confirm with your provider, such as Gmail, for the correct input. Providers like Microsoft 365, Outlook, Hotmail, and Live.com utilize 'smtp.office.365.com,' while MSN employs 'smtp-mail.outlook.com.'