Hey there,

Currently EasySocial doesn't allow you to invite the same email address more than once. This is to protect site owners from having their emails getting marked as spam.

You definitely want to disallow this but should you really decide to lead your mails to get marked as spam, then you can edit the file /components/com_easysocial/controllers/friends.php and at line 59, remove the codes below:

Do this at your own risk and get prepared for all your emails to be in the spam folders soon