Where is email data stored on my cPanel server?

Question

Where are email messages and other email-related data for my cPanel users stored on the filesystem?

Answer

Email for cPanel users is stored in the following directory:

/home/$user/mail/

Email for a specific email account on a domain is stored in the following directory:

/home/$user/mail/$domain/$email-user/

Path, user/group ID, and obfuscated passwords for email users can be found in these files:

/home/$user/etc/$domain/passwd
/home/$user/etc/$domain/shadow

In the paths above:

$user is the cPanel username

$domain is the domain associated with the cPanel user

$email-user is the email user on the domain