You will find the following possible email statuses in Frello:
Processed – Message has been processed and is ready to be delivered.
Delivered – Message has been successfully delivered.
Opened – Message has been opened by the recipient.
Clicked – Recipient has clicked on a link in the message.
Deferred – Receiving server temporarily rejected the message.
Dropped – Message not sent due to various reasons.
Bounced – Receiving server could not or would not accept the message.
Error – An error occurred while sending the message.