Postcards

[imtuesday]

Hello!
I'm going to Paris next week just for a few days. I'd love to send a couple of postcarts to my friends when i'm there. What I'm afraid of is that it'll take me long to find a post office. Do you think there's some other way to mail a postcard from Paris? Some online service? Do you often send postcards while travelling? Is it always easy to do it?
Thanks in advance.

[Tourismzone]

What country are you from ?

Depends how many days 3 or 4 or even 5 days.

Send the postcard the same day you arrive at paris in france.