I received email from Namecheap asking to verify contact data for my domain(s). What should I do?
"Important Notice Regarding Your Domain Name(s)" email is a legitimate email from Namecheap.com and is simply a reminder to make sure your contact info is up-to-date. Such notifications are sent from the <firstname.lastname@example.org> email, which is also legitimate.
If the contact information for your domain(s) needs to be updated, please do so from your Namecheap account.
Such emails are required by ICANN. You can also check more information about this here.