Australian snails eat mail

I think there may be some confusion here!

There is no scientific evidence to suggest that Australian snails, or any snails for that matter, eat mail. Snails are herbivores, which means they primarily feed on plant-based foods such as leaves, stems, and flowers. They don't have the physical adaptations or behavior to consume paper products like mail.

It's possible that you may have come across a humorous or fictional reference to snails eating mail, but it's not based in reality.