These emails are sent to you as an alert for matches, recent visitor invites etc. on your profile & helps to accelerate your matchmaking.
If you wish, you can stop these alerts. All you need to do is log in to your profile and click the link:- https://www.sangam.com/alert-settings
Mobile app user can follow below steps:-
1) Open App. On the Home Tab, scroll to the bottom screen.
2) Click "Settings" under "Quick Links".
3) You will see options to unsubscribe alert mails for Matches, Activity & Offers.