Related Questions:
Why an email I am trying to send through Event Temple is saying "queued"
Why would an e-mail say 'Queued'?
How long does it stay in Queued?
Answer:
When you send an email from Event Temple, it marks the email as 'queued' while it is processed and being sent. After it is successfully sent, the email will automatically be marked as sent.
Queued emails are generally very quick (less than 30 seconds), however can occasionally take a little longer, due to throttling from your email provider, or a backlog of emails being sent from other users at the same time.