Can't send any mail in-game.

Hello i got a bug with the mail in-game whenever i try to send a mail i get the message "You have reached the in-game cap of unique mail recipients" this happen with everything trying to send gold from main to alt or reputation enchants which are bind to account in general with everything...

That means that mailbox of your alt who you're sending mail to is full. Delete mails from mailbox.

I thinked that as well Thorbjorn , but sadly i dont have any mail at all i checked 3 times if i got any mail.