PlentyofFish is one of the only online dating sites where everything is free including forums, personality matching surveys and messaging.
This painless price point has sent subscribers in droves, with a recent estimate of [90 million registered users](http://www. pof. com/en/press/).
You can only block users you already have a message from, so you will not be able to block people you have not interacted with and vice-versa.
**To block another POF user:**.
Open their message in your Inbox. 2. Click the **Block User** button at the bottom of the message.
The easiest way to determine whether [you've been blocked by another user on the PlentyofFish](http://www.
pof. com/HelpCenter/helpCenter_reportUser. aspx) site is realizing your inability to send him or her a message. If you are able to find the person's profile in a search, and even view it, but can_not_ send that person a message, he or she has blocked you.
Often the block isn't personal and has more to do with the strict criteria they have set for contact in their Mail Settings.
If you do not meet the criteria, you are automatically blocked by POF from sending the person a message.
Searching for a profile is simple.
Click on **Search** in the POF navigation bar at the top of your screen. 2. Choose the **Username Search** tab. 3. Type in the username of the person you want to find. 4. Select the **Find user** button.
If you block a user and wish to unblock them later, open any message in your inbox and click the **Users I Blocked** button in the lower right of the screen.
You can unblock any user on the list at any time.