ANSWER:

If the water has reached in between your toes, pouring water is sufficient but the sunnah is to insert your fingers between your toes to ensure that. 

The imams was conducting a class in the masjid and the topic was, wudhuu he said pouring only water on the feet is not enough,it is must to pass fingers in your feet fingers,is this real.

Ablution (Wudhu) |