> ## Documentation Index
> Fetch the complete documentation index at: https://moengage-unity-sdk-initialization-split.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# How Is an Email Drop Event Generated?
> Learn when MoEngage generates email drop events during campaign delivery, including unsubscribe, spam, bounce, and missing email address cases.
## Explanation
Email Drop event, which occurs during the Email campaign delivery, is generated under the following scenarios based on your actions and attributes:
1. When user attribute unsubscribe, spam and bounce is true.
2. When a user's email address is missing or lacking a valid email attribute.
* Implementing the *Email Drop* event in the flow by MoEngage has significantly increased the *Email Drop* event count.
* The *Email Drop* event is an internal event specific to MoEngage.
## Explanation
Email Drop event, which occurs during the Email campaign delivery, is generated under the following scenarios based on your actions and attributes:
1. When user attribute unsubscribe, spam and bounce is true.
2. When a user's email address is missing or lacking a valid email attribute.