How is Delivery Rate calculated in Marketo?

Delivery Rate in Marketo is calculated by taking the number of emails that are accepted at the email gateway and dividing it by the total number of emails sent. This metric is critical in evaluating the effectiveness of email campaigns because it gives marketers insight into how many of their emails successfully reached the recipient's server.

When an email is accepted at the gateway, it means that the recipient’s mail server has processed the email and it is on its way to the recipient’s inbox, barring any issues such as spam filters or the email being blocked after acceptance. Thus, tracking the delivery rate in this way helps in assessing the overall health of an email marketing campaign and identifying potential issues with email list quality or sender reputation.

The other options, while related to email performance, measure different aspects. The calculations based on emails opened or clicked provide insight into engagement but do not reflect whether the emails reached their intended destination. The calculation involving emails bounced pertains to delivery failures, which would rather highlight problems in the delivery process but is not the metric for delivery rate itself.