<img width=“750” height=“496” src=“https://flowingdata.com/wp-content/uploads/2021/10/mail-routes-750x496.png" class=“attachment-medium size-medium wp-post-image” alt=“” loading=“lazy” srcset=“https://flowingdata.com/wp-content/uploads/2021/10/mail-routes-750x496.png 750w, https://flowingdata.com/wp-content/uploads/2021/10/mail-routes-1090x720.png 1090w, https://flowingdata.com/wp-content/uploads/2021/10/mail-routes-210x139.png 210w, https://flowingdata.com/wp-content/uploads/2021/10/mail-routes-768x507.png 768w, …