In Account Settings, there is the option "Messages are currently sent to:"
I have selected Both (Darkness, and Email), but Messages are still only sent to Darkness and not my registered Email. I have avoided selecting just "Email" firstly because I want them to go into Darkness as well, but also because i'm worried that the feature will still not work, and I will miss DMs.
Mine is currently set as Both and has been sending messages to my inbox while leaving them as a DM also fine for years. If yours doesnt work then you may need to look at if SWC somehow doesnt accept your email address as valid and bug it.
There was a simnews recently explaining that they have turned the feature off due to complaints about spam :/
“Disabling automated forward from DM to email (Posted by Veynom on Year 13 Day 153)
Today we had to disable the automated forward of DM (Darkness Messages) to your email because we suddenly have been considered as spam by Microsoft Hotmail and Live and our host threathened us to close our services hic et nunc. We will study the possibilities to re-enable that feature in the future. Sorry for the inconvenience.
Yes, testing on Dev and helping out with bug reports, which in themselves are important and she's doing a great job at it. So long as her answers here are useful and relevant then I don't see the point in aiming all that much criticism. So long as while she's here she's helping then so be it.