The business currently uses a cumbersome URL. It's clunky, but senior staffers are attached to it. We've purchased a few sleek new domains, and for the next few years, sleekdoma.in will just forward to cumb.er.so.me.
Those staffers won't care about new email addresses, and we want to start using email right away in the firstname.lastname@example.org format. But we'll have a public-facing web site with the cumbersome URL.
So the behavior that I want is that an email sent to email@example.com will be automatically delivered to firstname.lastname@example.org, without having to manually set up that forward.
I've tried to accomplish this with MX records at Dreamhost, and got myself tangled up. I still haven't found our host moving forward, and would be happiest working with a host that offers this as a service. I'm open to any recommendations, whether DIY or $.