When I send my email to EOA, the test results show a broken image icon appearing where an svg image should appear, and this is true for all platforms where I believe it should work (Apple Mail, Outlook 2016 for Mac, all iOS devices). When I send the same email to my personal email account and view it in Apple Mail on iOS it appears as expected (IMG_2393-600 2.png).
In the email, there are two logos at the top. The first is the SVG with PNG fallback. The second is PNG only (for comparison).
(Since the logo is white, if when troubleshooting you view it by itself on a white background you won’t be able to tell it’s there.)