A better tip is to just add some gibberish in the To: section (ie "blahblahblah"), which will stop Gmail/Outlook from sending as it can't recognize the email address. Then when you're ready to send, just delete the gibberish. This works well when you're doing big reply all emails.
Taibo t1_jdvvo4r wrote
Reply to comment by jaiox in LPT: When sending emails, add the recipient email addresses LAST, once you are sure the email is ready to send by [deleted]
A better tip is to just add some gibberish in the To: section (ie "blahblahblah"), which will stop Gmail/Outlook from sending as it can't recognize the email address. Then when you're ready to send, just delete the gibberish. This works well when you're doing big reply all emails.