add some host for mail client dns problem

Hi, i only want to add some hostnames for mail setup like pop3, smtp so i added to dns zone template this new record: .................................. .................................. %domain%. IN A %ip% %domain%. IN AAAA %ipv6% ipv6 IN AAAA %ipv6% %domain%. IN MX 0 %domain%. mail IN CNAME %maildomain%. pop3 IN CNAME %maildomain%. smtp IN CNAME %maildomain%. www IN CNAME %domain%. ftp IN CNAME %domain%. after changes i reset my zone but hostnames does not work and dns does not resolve # dig @host.example.com smtp.example.com A ; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.10 <<>> @host.example.com smtp.example.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 35265 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;smtp.example.com. IN A ;; Query time: 0 msec ;; SERVER: 1.1.1.1#53(1.1.1.1) ;; WHEN: Fri Oct 21 11:00:37 CEST 2022 ;; MSG SIZE rcvd: 50 i have exim sending with domain IP address i does not understand what can be the problem. thanks for help