`Your email address must match your custom sending domain` error is opaque

[benborgers]

It now surfaces as An error occurred while communicating with the server..

https://secure.helpscout.net/conversation/2711298138/5603

[jmduke]

Due to https://github.com/buttondown/monorepo/commit/93e203238a86d936cbfa3471ac53690ee4f35c97. Should be a trivial fix to re-introduce the errors