How to configure SMTP Relay on Exchange online for internal application server

SPGEP 0

SMTP Relay on Exchange online

1 answer

Xintao Qiao-MSFT 790 Reputation points Microsoft Vendor

2024-06-04T09:23:20.3966667+00:00

Hi, SPGEP

It looks like your problem is using a multi-setup multifunction device or application to send email using Microsoft 365 or Office 365.

To help you with the configuration, could you provide more information about the configuration environment?

The following links can help you get started How to set up a multifunction device or application to send emails using Microsoft 365 or Office 365 | Microsoft Learn
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SPGEP 0 Reputation points

2024-06-04T13:12:10.0266667+00:00

We have Docker Container AKS cluster for the Website which require SMTP Relay. Cluster has Public ip which we provided on SMTP Relay connector as whitelist in Connection Safelist. During Telent test 451 error for STARTTLS is appearing preventing relay despite successful connection from container.

Xintao Qiao-MSFT 790 Reputation points Microsoft Vendor

2024-06-06T09:45:42.6533333+00:00

Hi, SPGEP

Are you following the method in the file I provided above for the relay setup?

In addition, could you provide a screenshot of the error so that I can troubleshoot it in the next step?

Xintao Qiao-MSFT 790 Reputation points Microsoft Vendor

2024-06-12T10:02:53.2366667+00:00

Just circling back to check to see how things are going on with this thread. Should you need more help on this, you can feel free to post back.
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