[kevincox]

You actually only have 10ml of mayo but it isn't in a 100ml container. You will need to throw out the sandwich.

Next time consider bringing all liquid condiments in separate 100ml containers and applying them to your sandwich after security theater.

[schwartzworld]

Most of the fast food options inside the airport will give you free condiments, or there may even be a station where you can just grab mayo after getting through security