[joeyphoen]

Similarly, I run my own email domain where all addresses go to the same inbox, so I can give all entities their own email address (e.g. [e-mail], [e-mail]). So far every single political email has come to the address that I ONLY gave the CA DMV.

[itsdrewmiller]

Did you register to vote through the DMV? Doing so might have gotten your email into their publicly accessible voter file (although I have no idea whether CA actually includes email on their voter file).

[datadrivenangel]

I do this with fastmail. The aliasing has gotten really good.