Your transfer happens on mainnet, and will be sent to the address you specified. What happens will depend on a few factors:
If you (or your wallet) disable
bounceflag, the TON amount will be sent and will remain at the recipient's account.
If you (or your wallet) keep the
bounceflag, then it depends on the recipient account:
A. If there is no smart contract at the destination, it will bounce back.
B. If there is a smart contract, it will depend on its behavior, and it might accept or reject it.