Create adds an email as draft in DynamoDB TODO: refactor this function gocyclo:ignore.

Delete deletes an trashed email from DynamoDB and S3.

get returns the email.

Get returns the email and marks it as read.

Get returns the email.

List lists emails in DynamoDB TODO: refactor this function gocyclo:ignore.

Read marks an email as read or unread.

Reparse re-parse an email from S3 and update the DynamoDB record.

Save puts an email as draft in DynamoDB TODO: refactor this function gocyclo:ignore.

Send sends a draft email.

Trash marks an email as trashed.

Untrash marks an trashed email as not trashed.

EmailTypeInbox represents a draft email.

EmailTypeInbox represents an inbox email.

EmailTypeInbox represents a sent email.

TODO: refactor EmailTypeThread represents a thread, which is a group of emails.

CreateInput represents the input of create method.

CreateResult represents the result of create method.

GetResult represents the result of get method.

GSIIndex represents Global Secondary Index of an email.

ListInput represents the input of list method.

ListResult represents the result of list method.

SaveInput represents the input of save method.

SaveResult represents the result of save method.

TimeIndex represents the index attributes of an email.