The CentOS system sends an error message to your frequently used mailbox.

The CentOS system sends an error message to your frequently used mailbox.
Root User TransferWhen an error occurs in the system or an important notification is sent to the root user, let the system automatically forward the email to our usual mailbox, so that you can easily check the relevant reports and logs.[Root @ sample ~] # Vi/etc/aliases ← edit aliases and add the following line to the end of the text

Root: admin@centoscn.com guest add your own email address

[Root @ sample ~] # Newaliases restore rebuilding aliasesdb
/Etc/aliases: 79 aliases, longest 19 bytes, 825 bytes total

[Root @ sample ~] # Echo test | mail root users send a test email to root

If it succeedsA Test message is received in the mailbox of the admin@centoscn.com.