Crud actions

Nice work here! Very good stuff. I would put "inbound" into a constant on this class or some other class. Generally speaking, strings / integers shouldn't be hardcoded into the middle of logic but should instead be put in constants where they're easy to find and change in one place.

```ruby
class EmailProcessor
  PREFIX = "inbound"
end
```
Just call PREFIX to refer to the constant from within the class. From outside of the class, you have to use EmailProcessor::PREFIX