You will need to setup a support email, so that customers can contact your support team for issue resolution. This is typically firstname.lastname@example.org.
Additional to the email address a support page will provide your customers with the most commonly asked questions. Help them troubleshoot and resolve issues quickly without the need to contact a service desk agent.
The support page should be included at the bottom of any mail campaigns to customers, to create continued awareness of the self help capabilities.
Please check these pages to build your FAQ: