cPanel is a commercially available and popular Linux for managing all aspects of a web hosting account.
Setting up emails as usual even when an autoresponder is functioning.
Follow these steps to set up an autoresponder

• Log in to your cPanel.
• In the Mail section, click on the Autoresponders icon.
• If you manage multiple domains, select the domain for which you want to set up an autoresponder.
• Click the Add Autoresponder button.
• On the next page, enter an interval value, an email address for which you want to create an autoresponder.
• Complete other fields which include – From, Subject and Body (i.e. the text of the response). Then choose a Start and a Stop time for the autoresponder to function as you want.
• Click the Create/Modify button to save.

If your selected ‘Start’ time is ‘Immediately’, the autoresponder will be activated without any delay.