1- Login to your client admin then go to Advanced features
2- Click on the Misc tab, in the import contacts field change to yes (allow Members to import contacts themselves).
First, you have to login to your system. Look for and click the import contacts link.
Then you will be redirected to a page where you have to upload the CSV file containing a list of the contacts to upload.
And once you've uploaded the file. Scroll all the way down, and from there you will see a dropdown for the contact groups. So each contact groups have different sets of autoresponder messages.