Thank You. If I send an erc20 token to a random user on metamask, will he still receive the tokens if he has not added that particular erc20 token in his metamask account.
if you send to correct address and transaction was successfull ofcourse it will sent and added in their metamask account or if check it on etherscan. sometime new token need to add custom token to make it occur in your metamask but it will automaticly occur if look at etherscan. its very simple to send and add it in metamask.