Sending Email via MS 365 Graph

Help & Questions
1

Hi Support

We are encountering an issue when attempting to send email via the Microsoft Graph API.

Error details:

Exception: Unable to send email message: Client error: 
`POST https://graph.microsoft.com/v1.0/users('Support%40mpr-it.co.uk')/sendMail` 
resulted in a `400 Bad Request` response:

{
  "error": {
    "code": "InvalidInternetMessageHeader",
    "message": "The internet message header name 'In-Reply-To' should start with 'x-' or 'X-'."
  }
}

The send mail 

![image|690x166](upload://7GsWnXz5vIBgiVFEbvM8OxLYcEe.png)




The message history is https://console.uk1.mspintegrations.com/email2at/advanced/history/17791919023910002t9p

Thank you
2

@Richard

Thanks for reporting this. We have a fix deployed to our testing site. I expect this will be live next week.

3

@travis Thank you, there is also a browser freeze when you enable HTML tick box.

4

@Richard the browser freeze is mitigated in our testing site, as well. Both should be resolved early next week.

Thanks for your patience!

5

Hi @Richard

Both issues should now be resolved. Please check and confirm.

If you see any other issues, please let us know!

6

Sending via Graph API is working now.

7

This is my favorite type of message to read. Thanks for confirming!

:smiley:

8

Will there be an easier way to update the existing connections rather than changing it in each relevant step in every workflow?

Since there can be a multiple senders, and therefore, multiple Graph connections, it can’t be a single configuration. Maybe, a one-time tool to switch from the old connection to the new connection per email sender?

If that isn’t coming, it’s not the end of the world. Just checking before I spend the time revisiting every existing workflow.

9

@user1 You’ve made a really good point.

I think it makes sense for the system to automatically choose the Graph API connection based on the from-address like we currently do for SMTP connections. We’ll take a look and figure out an elegant way to do that so you don’t need to modify all of your sending actions.