SMTP endpoint not working

[hoylandpaul]

On the Meraki platform I've setup a SMTP target pointed at the Microsoft O365 direct send endpoint for our org but it's failing with the following error (I've changed out the IP address - the actual error has our email address in it):-

{
  "output": {
    "error": {
      "code": "400",
      "message": "action execution  errored for type email.smtp_send_email err:code:400 message::dial tcp 0.0.0.0:25: i/o timeout"
    },
    "response": {
      "elapsed_time": 15.048816412,
      "end_time": "2025-10-13T14:28:30.56Z",
      "start_time": "2025-10-13T14:28:15.511Z",
      "succeeded": false
    }
  }
}

I've raised a support call but I don't think they even knew about this new feature as they kept asking me which network it related to, and to do a capture of my browser session.

Does any one here have any ideas or do I need to wait for the escalation?

[Ed Novak - Cisco Workflows TME]

@hoylandpaul Could you please confirm that the status of your SMTP Target is valid and could you share more details for the send email activity?

[Ed Novak - Cisco Workflows TME]

@hoylandpaul unfortunately, MS does not allow old school SMTP targets anymore and you need to use OAuth2 Microsoft Graph Credentials with Microsoft Graph Endpoint Target in workflows for MS email activities.  All the email activities work with both target types.