To get to the Mail Settings customisation options click on your employer name in the main menu and go to Settings -> Mail Settings
From here you can change the name and email address that is used when emails are sent out from the system on your behalf.
If you change the email address we will email the new address a confirmation link to verify you won the address. Emails won't be sent until you've clicked on the link in that email
All emails that are sent are in HTML format. As well as customising the content of these emails you can also customise the surrounding HTML.
Tick the checkbox labeled 'Customise the HTML used for emails' from here you can make changes to the CSS and HTML used to create your emails.