|Message has been successfully delivered.
|Message has been identified by the receiving email server as SPAM. Determined by the content or sender of the message.
|Recipient mail server temporary error, misconfiguration or the server is undergoing maintenance.
|Delivery has been denied from Smaily (or any service).
|Smaily misconfiguration or error denying message delivery.
|Message delivery has taken more than the maximum amount (2 days) of time.
|Message recipient's mailbox is disabled or inactive.
|Message recipient's mailbox is full.
|Message recipient's mailbox does not exist.
|Hourly/daily sending limits exceeded.
|Incorrectly configured SPF or invalid DKIM signature.
|Temporary delivery error.
|Message status unknown.