Enable voicemail allows you to enable voicemail service.
Send caller to voicemail if my phone is not answered in allows you to set the number of seconds to wait before the caller calling your extension will be redirected to voicemail if phone is not answered.
Mailbox PIN sets a PIN for accessing your voicemail.
Notify by email about new voicemail enables email notification to defined below email address when a new voicemail is received.
Attach messages to email sets an option to attach voicemail audio file to email notifications.
Delete after delivery sets an option to delete voicemail records after email notification were sent.
Send notifications to secondary email address allows you to specify additional email address for notifications.