Sendmail Configuration files are saved in /etc/mail directory by default.
/etc/mail/access - sendmail access database file
/etc/mail/aliases - Mailbox aliases
/etc/mail/local-host-names- Lists of hosts sendmail accepts mail for
/etc/mail/mailer.conf - Mailer program configuration
/etc/mail/mailertable - Mailer delivery table
/etc/mail/sendmail.cf - sendmail master configuration file
/etc/mail/virtusertable - Virtual users and domain tables
