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When you want to send emails from the Kentico administration interface, you can:
Sending of emails is facilitated by the Email queue application. It enables the system to send out, for example, newsletters to recipients without the risk of losing any of the emails due to errors.
New emails registered in the queue are sent out automatically in regular intervals by the Send queued emails scheduled task. If an email is not delivered to the SMTP server successfully, it remains in the queue so that you can delete or resend it manually later.
During the mail‑out, e‑mails in the queue are distributed to the SMTP servers defined in the system. See Configuring SMTP servers to learn how you can register and configure SMTP servers in Kentico.
Successfully sent emails are displayed on the Sent emails tab for the number of days specified by the Archive emails (days) option in Settings -> System -> Emails.
The system attempts to send emails that failed to send for 1 hour following the first send attempt. After this period, you need to send the individual emails manually by clicking Resend all failed.
You can configure the settings related to emails in Settings -> System -> Emails in the Email processing section. See Settings - Emails.