# Tips: Understanding Recipient Handling in "Dynatrace Send Email Action" vs "M365 Send Email Action"

**URL:** <https://community.dynatrace.com/t/tips-understanding-recipient-handling-in-dynatrace-send-email-action-vs-m365-send-email-action/52114>\
**Category:** Dynatrace Tips\
**Tags:** problem-notification, workflows, tips-and-tricks\
**Created:** [June 16, 2025, 11:46am UTC](https://community.dynatrace.com/t/tips-understanding-recipient-handling-in-dynatrace-send-email-action-vs-m365-send-email-action/52114 "2025-06-16T11:46:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![DaveFz](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@DaveFz](https://community.dynatrace.com/u/DaveFz)\
**Post date:** [June 16, 2025, 11:46am UTC](https://community.dynatrace.com/t/tips-understanding-recipient-handling-in-dynatrace-send-email-action-vs-m365-send-email-action/52114/1 "2025-06-16T11:46:16Z")

</div>

## 📬&nbsp;Dynatrace&nbsp;Tips:&nbsp;Handling&nbsp;Multiple&nbsp;Recipients&nbsp;in&nbsp;Email&nbsp;Actions

When&nbsp;configuring&nbsp;email&nbsp;notifications&nbsp;in&nbsp;Dynatrace,&nbsp;it’s&nbsp;important&nbsp;to&nbsp;understand&nbsp;how&nbsp;different both email&nbsp;actions&nbsp;behave—especially&nbsp;when&nbsp;sending&nbsp;to&nbsp; **multiple&nbsp;recipients** &nbsp;and&nbsp;one&nbsp;or&nbsp;more&nbsp;addresses&nbsp;are&nbsp; **invalid&nbsp;or&nbsp;rejected**.

We&nbsp;maintain&nbsp;two&nbsp;types&nbsp;of&nbsp;email&nbsp;actions:

### 1.&nbsp; **Dynatrace&nbsp;Send&nbsp;Email&nbsp;Action**

- **Behavior:** If&nbsp;at&nbsp;least&nbsp;one&nbsp;recipient&nbsp;is&nbsp;valid,&nbsp;the&nbsp;email&nbsp;is&nbsp;sent.
- **Rejected&nbsp;Recipients:** Logged&nbsp;in&nbsp;the&nbsp;action&nbsp;output,&nbsp;but&nbsp;do&nbsp;not&nbsp;cause&nbsp;the&nbsp;entire&nbsp;action&nbsp;to&nbsp;fail  
  **![DaveFz_2-1750073792295.png](https://global.discourse-cdn.com/dynatrace/original/3X/a/1/a1abb1b09089549a1e5f62ddaa28d5c993b6db89.png)**  
 

### **2. M365 Send Email Action**

Unlike the&nbsp; **Dynatrace Send Email Action** , the&nbsp; **M365 Send Email Action** &nbsp;only fails when one or more recipient addresses are&nbsp; **incorrectly formatted**. For example, an address like&nbsp;‘[test.com](http://test.com)’&nbsp;(missing the&nbsp;@&nbsp;symbol) is considered invalid. In such cases, the M365 action will fail and&nbsp; **no email will be sent to any recipients**.

- **Behavior:** &nbsp;If any recipient is rejected, the entire email is&nbsp; **not sent.**
- **Error Handling** : The action fails, and no recipients receive the message.

### 🔍Why This Matters

This difference can impact alerting reliability and troubleshooting. For example:

- If you’re using the&nbsp; **M365 Send Email Action** &nbsp;and one recipient is misconfigured,&nbsp; **no one** &nbsp;gets the alert.
- With the&nbsp; **Dynatrace Send Email Action** ,&nbsp; **some recipients still get notified** , and you can investigate the failed ones later.

### ✅Tip

When using the&nbsp; **M365 Send Email Action** , consider validating recipient addresses regularly or using distribution groups to reduce the risk of failure.