i developed a web application with personalized email through my cpanel (admin@tailorsmind.com), connected it with my application through php (swiftmailer) in the source code, emails are going through for registration, login and forgot password but the problem I am simply having is my website logo won't simply just show up in each email that is sent. I logged in the email in outlook, tried checking for image settings but couldn't get one. also created a gmail account with the email and uploaded a logo but still not getting the result i am looking for . Please help !!!

it just keeps showing that question mark you see there and i don't want that.