This is the error message
SMTP error (554): Recipient “rigveda.timorason@gmail.com” cannot be added (5.7.1 rigveda.timorason@gmail.com: Recipient address rejected: your account has been blocked due to excessive mail sending).
However, your issue seems to be with you being blocked due to various reasons. First, I would like you to sign out of all mailboxes you are using the mail address with. Then, log in and change the password for that mail address. Once that is done, the mail address should not be blocked by the system anymore.
Do a test run. Does the mail work again? If yes, fine. Go and add the new password again to one tool at a time and see if you are blocked again.
The reason for this is that the system is blocking you when there is too many log ins at a time. At some point the system regards this as a security issue.
Please keep me on the loop here if that solved the issue.