"Please note that, as stated above, the site, application and services are intended to be used to facilitate travelers and senders connecting and arranging item transportation directly with each other. Airmule cannot and does not control the content contained in any package and the condition, legality or suitability of any items and luggage. Airmule strongly advises each traveler to inspect each item carefully. If a traveler does suspects an item is illicit, do not transport and contact airmule. Airmule is not responsible for and disclaims any and all liability related to any and all available transportation. Accordingly, any inquiries will be made or accepted at the member’s own risk."
I don't know how long that has been there, but it is clear. They are brokers, but don't accept any liability.