You may unsubscribe from the mailing list in the Email Notifications section of the settings.
Go to your profile by tapping on the icon in the bottom right corner of the screen → tap on the Settings icon in the top left corner of your profile page → choose the Email Notifications section.
Here you can uncheck the email notifications you're not interested in:
- New messages
- New suitable people
- New visitors
- New likes
- New matches
- New gifts
- Promoactions
Tap on the "Save Changes" button to complete the unsubscribe process.