I find the "Email results to" option is confusing, particularly for new FME Server users. They tend to think they would get the workspace results by email if they just write their email here, no matter the service chosen. Some of them might realize they have to configure an SMTP Email Server and do so in the System Email under admin > system configuration > network & email, but few understand they have to do it under the notifications.
It's still quite tedious having to configure the same SMTP Server for all services and success/failure combinations, not to speak about maintaining configurations in 7 different places, but that might be a different story and could probably fall together with this other idea https://community.safe.com/s/bridea/a0r4Q00000HbrxSQAR/fme-server-email-subscription-custom-template.
I think it would be great if this option could be renamed into something like "email notification to" or relocated under the advanced options. It would also be nice to make it more clear you need to configure notifications for this.