# Email Alerts w/ Additional Information

**URL:** https://community.graylog.org/t/email-alerts-w-additional-information/18419
**Category:** Graylog Central (peer support)
**Created:** [January 8, 2021, 1:33pm UTC](https://community.graylog.org/t/email-alerts-w-additional-information/18419 "2021-01-08T13:33:17Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![shoothub](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/shoothub/32/6412_2.png) [@shoothub](https://community.graylog.org/u/shoothub)
#### Post date: [January 12, 2021, 8:59am UTC](https://community.graylog.org/t/email-alerts-w-additional-information/18419/5 "2021-01-12T08:59:11Z")

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Check my previous post about this:

> [@Custom notification variables](https://community.graylog.org/t/custom-notification-variables/15667/7):
>
> You have to setup number of backlog to 1: in Alerts - Event Definitions - tab Notifications and field Message Backlog , tick the checkbox and set 1. Message backlog define number of messages to be included in Notifications. Source in default template for notification use {event.source}, which is source of event, not a source device. If you want device source included in notification message use: ${foreach backlog message}${message.source}${end} If you want to use user field (for example: s…

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_[View the full topic](https://community.graylog.org/t/email-alerts-w-additional-information/18419)._