All you can do is send an email to that address and ask that they send it back, since it was a mistake. Of course, if the account is inactive, nobody will get that email.
I think that if you send item mail to a global that doesn't exist, it's supposed to automatically bounce back to you, but I could be wrong.
You could also send a /petition in game or throught the website, but if they can do anything about it, which I doubt, the lowest level support probably can't, meaning that you'd have to wait for it to be escalated to a senior support rep.
@Roderick
FAIL
No, seriously, I really feel for you. That really sucks. I'd email and ask for it back. I'd assume most people would be cool with that. But, as stated, if it's a dead account, or just a player who only comes in every few weeks, like weekend marketers, you might have to wait a while.
I don't know if a petition would do anything. But it doesn't cost you anything to try.
Oh man that sucks. I hope you get this resolved. I'd have to agree with the above posters. Try emailing the same address and asking for it back, explaining it was a mistake. Then I'd also follow that up with a petition asking for help from a GM. Good luck.
PG
If it's an inactive account, the unclaimed email will be bounced back after 30 days. But yeah, I'd send another email asking if the item could be returned.
I finally got a purple recipe on my lvl 50 blaster. he couldn't use it so I wanted to send it to another 50 of minre. I accidentally sent it to the wrong address. Anyone know If or how i can get it back?
I wanted to send it to @dadda man but sent it to @daddaman.
Thank Dadda man