Submitting and receiving feedback on work
You have to check the work that is to be submitted:

The actual hand-in takes place as an option at the very bottom:

Depending on the load of the service at Ephorus, the actual hits that indicate possible plagiarism will appear in a few hours as one or more e-mails to the address you entered under the Ephorus settings. In periods of low load the typical response time is 10 minutes. You will not get a message if there are no hits in the search at Ephorus.
A possible reply may look like this:

The e-mails will contain attachments that you have to open and assess:

Where Ephorus has found hits, both the sent text and the "original" text will be displayed side by side. Whether this is plagiarism each individual teacher has to decide, and the use of this tool has to have an educational basis.