You may want to edit the title and add in 'mailing', that might get you some more views.
I've never mailed any cakes or cupcakes, so I don't have any advice on that sorry. 
i've been wanting to know the same thing. i did some research on it a couple months ago where i looked up online bakeries who shipped their products and what i found with cupcakes is that you will need a special container to ship them in.
some options were a small jar, where the cupcake is placed in side. i'm pretty sure that with this method the frosting will get smooshed a little
the other option i noticed, which i think is much better, is freezing the cupcakes and shipping them with dry ice via next day or overnight delivery. then when the person gets them they can just thaw and enjoy
Quote by @%username% on %date%
%body%