D-Link DGS-3120-48PC - Page 650

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DGS-3120 Series Managed Switch CLI Reference Guide
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Restrictions
Only Administrator-level users can issue this command.
Example
To test whether the SMTP server can be reached:
DGS-3120-24TC:admin#smtp send_testmsg
Command: smtp send_testmsg
Subject:e-mail heading
Content:e-mail content
Sending mail, please wait...
Success.
DGS-3120-24TC:admin#