Warning: NOTE: You can get a new clean config file with: doveconf -n > dovecot-new.conf

既存環境から設定ファイルを移行後に、dovecot を

起動すると以下のエラーが表示するようになりました

Dovecot Imapを起動中: doveconf: Warning: NOTE: You can get a new clean config file with: doveconf -n > dovecot-new.conf
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:87: ssl_disable has been renamed to ssl
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:96: ssl_cert_file has been replaced by ssl_cert = <file
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:97: ssl_key_file has been replaced by ssl_key = <file
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:754: add auth_ prefix to all settings inside auth {} and remove the auth {} section completely
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:791: passdb pam {} has been replaced by passdb { driver=pam }
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:892: userdb passwd {} has been replaced by userdb { driver=passwd }
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:955: auth_user has been replaced by service auth { user }

表示内容を確認すると doveconf -n > dovecot-new.conf  で

新しい設定ファイルが作成されるみたいです

doveconf -n > dovecot-new.conf  のコマンドを実行して

新しい設定ファイルが作成される事を確認出来ました

これからエラー部分を解消出来るように設定ます