How do I change the sender?

Go to LMS >  Settings >  Email settings.
Click on the tab Settings.  
Here you can set which sender is to be displayed. 

We advise you to use a recognizable name for the sender so the employee doesn't think it’s spam.
All emails are sent from [email protected] by default. 
If you want to use a different ‘From’ email address, you can send an email to [email protected] to discuss the possibilities. 
Do keep in mind that there are costs associated with such an integration. 
You can also set the 'Answer to email address’ here. 
By default this is [email protected], but we recommend that you set up an internal (general) email address here. If an employee then wants to reply to the email, it will be sent to your own organisation.