The semicolon is used as a separator for multiple email addresses when typing into the To and Cc section – but can be changed in the Outlook settings to a comma to separate multiple message ...

The free version of Outlook on the web ... and it can be helpful in organizing your inbox. Click the gear icon (top right), then Email and Conditional formatting to set this up.

Fortunately, Gmail, Yahoo, and Outlook offer powerful filtering ... are still useful for keeping your inbox organized. To set up filters in Yahoo Mail, open your inbox, click the three-dot icon ...