The following article explains the events that are captured under MassMailer Mass Email Status related list. As you know MassMailer uses the 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 the 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 the 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 the 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, then 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 Bounces often are caused by outdated or incorrectly entered email addresses.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.

Block

Blocked emails happen when your IP address has been added to a deny list or has been blocked by an ISP or messaging organization.

When your IP address has been added to a deny list or has been blocked by an ISP or messaging organization, the affected email shows up on this list. Typically it is possible to have your IP address removed from a block list, and some lists automatically do this after a period of time

Blocks are less permanent than Bounces. This is a list of refused messages that were either blocked by an ISP or deferred longer than 72 hours. In addition, SendGrid does not treat the blocks list as a suppression list - subsequent send to emails on this list will be sent like normal.

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” represent 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.

Reply

MassMailer lets you track the replies from your email recipients provided you set up the Reply Settings (previously called Inbound Parse) in MassMailer. 

Spam Report

Most internet service providers provide a feedback loop, sending specific spam complaints to 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.

Group Unsubscribe

A group unsubscribe happens when a recipient indicates that they would like to opt-out from a specific type of email that you send via the Unsubscribe Groups link from within your email.

Group Resubscribes

A Group Resubscribe event is recorded when a recipient who previously opted out of a specific email group chooses to opt back in.
This applies only to unsubscribe groups and not global unsubscribes

Hard Bounces

A Hard Bounce means the email could not be delivered due to a permanent issue such as:

• Invalid or non-existent email address
• Domain does not exist
• Recipient mailbox disabled
  These emails should be removed from mailing lists.

Soft Bounces

A Soft Bounce indicates a temporary delivery issue, such as:

• Recipient mailbox full
• Receiving server temporarily unavailable
• Message too large
  SendGrid retries soft bounces for up to 72 hours.

Failures

The Failures metric is a combined summary of all emails that could not be delivered successfully.

This includes:

• Hard Bounces
• Soft Bounces that ultimately failed
• Drops
• Spam reports
• Suppressions

It provides a consolidated number that helps quickly identify how many emails failed in total without checking each event type individually.

Suppressed

A suppressed email is one that SendGrid chooses not to send because the address is in a suppression list.

An address gets into suppression when:

• It previously produced a bounce
• The recipient marked a previous email as spam
• The user globally unsubscribed
• The address is invalid or has a history of delivery failures

Not Clicked

This event indicates that although the email was successfully delivered (and possibly opened), the recipient did not click any links inside it.

Not Opened

This shows emails that were delivered but never opened by the recipient.

Recipient Unique Clicks

This counts unique recipients who clicked on any link in your email.

Example:
,If one user clicks 5 links → counted once.
If 10 different users click at least one link each, → counted as 10 unique clicks.

URL Unique Clicks

This event reports how many unique recipients clicked each specific URL within your email.