I assume this isn't currently possible, but I'll ask it in the hope it can be made into a feature request:
Many email providers offer the option of adding multiple domains as an alias for email addresses. For example, I have my 'main' domain: domain1.com, and a secondary domain: domain2.com
By setting up an alias domain, I could have email go to either myname@domain1.com and also myname@domain2.com.
Google can explain it better than me (here). Hopefully that makes sense.
Is this possible now/can it be made possible, without having to manually set up emails for each domain?