So I'm playing through the game for a second time and didn't do any of the side-quest things as I didn't know that I needed to send mail to other people to access them, I'm really interested in doing the Orichalchum/lv.99 job items thing, and it seems I have to send mail to other people to get that moving.

So my friend code is- 3952-2381-2143

And from what I read I have to have the other person add my number as well as I have to add them. So the question I have is that if I add some random person from the board, and they add me, do we both have to be logged into MogNet at the same time for it to validate the numbers through so we can start sending mail? Or if I add you and log on, and then a few hours later you log on will it validate? I'll be off and on regularly to check the board if anyone would like to set up a time if we have to both be on at the same time >< Thanks in advance!