Part of canonical.launchpad.interfaces
| Class | InvalidEmailAddress | The email address is not valid. |
| Class | EmailAddressAlreadyTaken | The email address is already registered in Launchpad. |
| Class | EmailAddressStatus | Email Address Status |
| Interface | IEmailAddress | The object that stores the IPerson's emails. |
| Interface | IEmailAddressSet | The set of EmailAddresses. |