question about old accounts and transfering items

[Thepkmhippie]

hi i found some of my old logins and have antausiasticly send a bunch of items trough mail to the current account im playing on silver i tought.

but these were on Gold and as dumb as i am i already made an gold account thats at startpoint of the game when beginning the current account.

 

should i get gold to rainbow badge to collect these mail? and is there a way to get these to silver on my current account?

or is there a way to say merge these 2?