I've checked my spam filters and everything.
I just cannot get my license lookup email.
Recently lost the last 2 years of emails in a computer issue, and I need my newest license key.
Are you using the same email that is registered at CCleaner, ie the one you gave when you bought it?
If you now have a different email, or if you are still having problems then you will need to contact support for help.
You can use the form here to raise your request: https://support.ccleaner.com/s/contact-form?language=en_US&form=general
Please be aware that support are very busy at the moment and although you will get a ticket number when using the form, and an acknowlegement email, it's taking much longer that usual for a person to reply. (A week or longer).
Please also note that as it tells you in the email opening another ticket may put you back down the queue and so further delay the response.
(That's just the way that the automated queueing system works).