Trying to remember email
If you have your 12 words phrase from blockchain.info you can just restore your wallet, then you will use a new email and new password.
To restore your blockchain.info wallet:
1 - Go to: https://login.blockchain.com/#/login
2 - Click on Need some help?
3 - Click on Recover Funds
4 - Use your 12 word phrase, lowercase, with spaces between each word.