Store or at least be able to report on just the domains of emails

[brendanheywood]

Option 1)

As an email comes in split both to and from into the inbox + domain parts are store them separately. This might make it harder to report on the whole email

Option 2)

As an email comes in split the domain out and store the full email in 1 field and the domain in another. Will increase data size but probably be much nicer to work with on the reporting side