Following article explains the events that are captured under MassMailer Mass Email Status related list. As you know MassMailer uses SendGrid email server in the backend to send mass emails, so we do capture the events notified by the SendGrid server.


Requests

A request is an email sent and is reported in your SendGrid dashboard every time SendGrid servers get a “request” from MassMailer application to send an email to one of your recipients.


Processed

This event fires when SendGrid receives an individual message and prepares it to be delivered. Think of this as the top of the funnel–unless it is dropped (see below), each message you push to SendGrid will create a processed event.


Dropped

There are a number of reasons your email will not even be sent to a recipient for delivery. This event informs your system when an email has been dropped. Further, it provides a reason for the drop, such as if we’ve found spam content (if spam checker app is enabled) or we see the recipient has unsubscribed previously.


Deferred

When an email cannot immediately be delivered, but it hasn’t been completely rejected, the deferred event fires. Sometimes called a soft bounce, SendGrid will continue to try for 72 hours to deliver a deferred message.


Bounce

If a server cannot or will not deliver a message, SendGrid fires a bounce event. Bounces often are caused by outdated or incorrectly entered email addresses. Many times you won’t know a bounced email address until it bounces. This event can help you ensure it doesn’t bounce again by removing it from your lists.


Delivered

When an email has been accepted at the receiving server, the delivered event fires. This event does not guarantee that the email was placed in the recipient’s inbox. In fact, a delivered email is only the beginning of an opaque process. The remaining four events begin to give us hints about whether anyone will ever see this delivered email.


Clicks & Unique Clicks

The “Clicks” statistic represents the total number of times your users have clicked on the various links within your emails. “Unique clicks” represents the number of unique individuals that have clicked the links in your emails. So, if a certain customer clicks the same link more than once, it will only be reported once in the “unique clicks” count.


Opens & Unique Opens

The concept explained above regarding clicks also applies to opens. An important thing to keep in mind when evaluating numbers around opens is that many email clients often do not load images by default. Therefore, a customer could potentially open your email, read it, and even click a link, without an open being reported. This is obviously not ideal, but as we advance in our tracking mechanisms, we should be able to gain greater accuracy in instances such as this.


Spam Report

Most internet service providers provide a feedback loop, sending specific spam complaints to the email service providers. When SendGrid receives a notice, we fire a spam event, so that you can react appropriately–or at the very least, never send another email to that address.


Unsubscribe

One of the most important events fires when a recipient unsubscribes from your mailings. Reacting immediately to an unsubscribe by removing the email from your lists can pay long term dividends in fewer spam reports and a higher engagement rate.