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NSM won't send emails

I am trying to set up Notification in and I can't get it to work. I'm testing it by trying to send a two factor email for a user and I get "Internal Server Error" every time. Our exchange administrator never sees anything from the NSM server.

NSM 2.3.2-R12-H3 Soniccore Build (6.5.0-616) in a Closed network.

Microsoft Exchange server on the same network.

In Notifications

Mail Server (name or IP address) - IP of my exchange server

From E-mail address - (dummy address)

Advanced settings are turned off.

In Log & Events

Time2022-02-15 10:29:09


Log LevelError

MessageSending TFA Token failed.

Message Time2022-02-15 10:29:09

Additional Log Data{"Certificate":{"Raw":"MIIDdzCCAl+gAwIBAgITMAAAA5S+.......(removed the certificate string to save space) [""],"PolicyIdentifiers":null},"Host":""}

Source IPNA

Tenant NameGlobal Default Tenant

User NameSystem

User RoleSystem

Request Idaeb08ebc-4915-4bff-bd26-1f5906f31b44


Category: Network Security Manager


  • Options
    Michael_BischofMichael_Bischof SonicWall Employee
    This could be related to the TLS version your SMTP server is forced to use and by the current NSM version you are using.

    Please open a support ticket on and let our team have a look into this.
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