Why is FSRM no longer sending quota alert emails after TLS 1.2 upgrade?

Olivia Gonzalez 20 Reputation points
2026-09-10T17:19:03.5366667+00:00

I am very upset that FSRM will no longer send quota alert emails to administrators after our SMTP server was upgraded to require TLS 1.2. I have relied on this notification system for the majority of our server monitoring, and it upsets me that we will lose all of our timely storage warnings and have to manage disk capacity blindly through a service that apparently does not support modern email security standards out of the box. FSRM email alerts are critical for catching disk usage spikes before volumes fill up, but the settings don't seem to have any direct options for modern TLS authentication.

How do we reconfigure FSRM notification settings to support authenticated TLS email delivery? PLEASE tell me there is a working solution for this!!!

Windows for business | Windows Server | User experience | Other
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Answer accepted by question author
Tracy Le 11,535 Reputation points Independent Advisor
2026-09-10T18:07:16.1766667+00:00

Heelo Olivia Gonzalez,

File Server Resource Manager (FSRM) still uses the old CDO.Message mail pipeline, which doesn’t support modern TLS or authenticated SMTP submission. When your mail server started enforcing TLS 1.2 and secure authentication, FSRM stopped sending quota alerts because it can only push plain‑text SMTP traffic over port 25 without STARTTLS.

The proper way to fix this without weakening security is to route FSRM alerts through an internal SMTP relay. You can set this up by enabling the IIS SMTP virtual server on the host, configuring an Exchange receive connector, or using a relay utility like Stunnel. In the relay settings, allow anonymous or IP‑restricted inbound connections from 127.0.0.1 on port 25, and configure the outbound smart host with TLS 1.2 and valid credentials for your mail provider.

Once the relay is running, open File Server Resource Manager, right‑click File Server Resource Manager (Local), choose Configure Options, and under Email Notifications set the SMTP server to localhost or 127.0.0.1. Use the Send Test Email button to confirm that alerts pass through the relay and arrive securely in your inbox.

Tracy Le.

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