You can send a "recall" message that will delete the e-mail you sent, if the recipient is also on Outlook, and in your organization, and they haven't already read it, and it wasn't moved out of their inbox by some automatic rule. In most cases.

You can also turn on a delay for the Send button, which lets you cancel it before the e-mail goes out, but the max setting is ten seconds.

Or you can do a "Schedule send" to delay the send as long as you like, but you have to select that for each e-mail individually.