There are several reasons why one may face the “POF messages not sending” issue. The recipient uses a “mail setting” that restricts you from contacting them through POF. In this case, your messages will automatically get deleted. Your profile may have been flagged by some users and it is currently under review.

How do you know if you have been blocked on Plenty of Fish?

The easiest way to determine whether youve been blocked by another user on the PlentyofFish site is realizing your inability to send him or her a message. If you are able to find the persons profile in a search, and even view it, but can_not_ send that person a message, he or she has blocked you.