Gmail account won't send email but outlook one does. Moves the attempted email to "Unread" folder.

Hi, I successfully synced an Outlook account and everything works perfectly. My Gmail account however has problems sending messages. It used to get stuck in the outbox, then after deleting the account and re-instating it now, whenever I hit send, doesn’t send the email but moves it to the “Smart folder - Unread” section. I have compared the IMAP and SMTP settings with the the ones Gmail recommends and all seems fine. Any ideas?

Could you please post here a screenshot of the SMTP settings?