That is a Feature found in AltaLink and Connectkey products, it isn't in the VersaLink family at all (different development teams)
There also is no Remote Control Panel, so you will need to go to the device to test the settings.
I just found out the answer to this question. The test feature has been moved to the address book; it is not in the SMTP settings area. I hope this helps. I do not currently have a C405 available for screenshots...
Daryl, I would love to see where you found this, because mine on launch and latest spar firmware has no such feature. On any VersaLink product that I can see.
Here's how I sucessfully managed to send myself an email from the web interface
System --> Remote Service upload --> Settings --> Checked all checkboxes and added my email adress --> OK (Don't bother with the Test connection... it's not for mail)
From a known working printer I sucessfully received an email
I'm troubleshooting my other printers this way... no email = smtp not working...
...At least this way I don't have to ask a user to manually test a scan everytime I change a config
Hope this help