How can I block messages from people who don't meet my preferences?

We don't offer a feature to block everyone who doesn't meet a specific set of criteria. Instead, we recommend clearly mentioning any preferences that you have on your profile, such as those for age or location. This way, when someone who doesn't meet these preferences views your profile, they'll know to move on to the next profile since you wouldn't consider him or her as a good match. You can add this information to the Ideal Match section of your profile at 

You can also block individual members who have contacted you using these instructions: How can I block someone from contacting me?