I am currently trying to create a Welcome Email for SF Community. The email includes an image stored in Static Resources (Cache-control = public).
When I tested initially using "Send Email and Verify Merge Fields", the image does shows up in the email. However, when I trigger the email through community (through adding new profiles), the image does not show up in the email. This is true for Gmail and Outlook.
I inspected the image source in gmail but the URL/src looks identical in both cases with the exception that gmail caches the image on a different CDN for each email. I did notice that, in Outlook, there are two attributes (
originalsrc=<correct image src/url>) when triggered through community.
Also, when sent via "Send Email and Verify Merge Fields", the sender is the System Administrator. When triggered through community, the sender is an email setup in the Community Workspace.