I think the mistake was using the word "block". A general purpose "email type classifier" might be useful.
No need to block the temporary email, but you might use that information for other purposes, like having it be some weight to a fraud detection system. Note, not calling it out as fraud outright, but using it as one data point among others.
No need to block the temporary email, but you might use that information for other purposes, like having it be some weight to a fraud detection system. Note, not calling it out as fraud outright, but using it as one data point among others.