I made latest updates by yum and rebooted the server. after reboot Postfix Mailserver can't start.
--> postfix.service failed
Logs:
postfix.service - Postfix Mail Transport Agent
Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Mit 2020-02-19 15:22:09 CET; 14s ago
Process: 10641 ExecStart=/usr/sbin/postfix start (code=exited, status=1/FAILURE)
Process: 10635 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS)
Process: 10632 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS)
Feb 19 15:22:07 postfix[10641]: Postfix is running with backwards-compatible default settings
Feb 19 15:22:07 postfix[10641]: See
http://www.postfix.org/COMPATIBILITY_README.html for details
Feb 19 15:22:07 postfix[10641]: To disable backwards compatibility use "postconf compatibility_level=2" and "postfix reload"
Feb 19 15:22:07 postfix[10641]: /usr/libexec/postfix/post-install: Error: /etc/postfix/postfix-files is not a file.
Feb 19 15:22:07 postfix/postfix-script[10659]: fatal: unable to create missing queue directories
Feb 19 15:22:08 postfix/postfix-script[10660]: fatal: Postfix integrity check failed!
Feb 19 15:22:09 systemd[1]: postfix.service: control process exited, code=exited status=1
Feb 19 15:22:09 systemd[1]: Failed to start Postfix Mail Transport Agent.
Feb 19 15:22:09 systemd[1]: Unit postfix.service entered failed state.
Feb 19 15:22:09 systemd[1]: postfix.service failed.
How can I solve this?