Check your email app or website where you usually sign in
Look at the account name or profile icon in the top corner
Open account settings and find the email address listed there
Check saved passwords or autofill in your browser or device settings
Search your inbox for messages from account services or sign-up confirmations
Look at other devices where you are already signed in
Check your phone settings under accounts or mail settings
Review recovery emails or backup contact information
Ask a trusted contact if they have emailed you before
Contact the service provider’s support if you still cannot find it