Understanding Your Email and Campaign Metrics
What is the Delivered metric?
The Delivered count is the total sent minus the undeliverables, sometimes referred to as a delivery rate. Despite the name, and much like Outlook’s own delivery receipt option, this metric does not indicate if the email was actually delivered into the recipient’s inbox or not—it only indicates that it the email was sent by your mail server to the recipient’s mail server.
Delivery into the inbox depends upon your email message content, use of file attachments, the recipient’s spam settings and your mailing reputation (reputation is maintained by ISPs and includes volume consistency, junk levels, spam complaints, bounce ratios, white listing, etc.). Your email could be blocked, filtered into the junk folder, or delivered to the inbox. The recipient’s mail server does not report this information back to the sender.