podman exec -ti mailserver setup add neu@domain.tld
podman exec -ti mailserver setup email list
podman exec -ti mailserver setup config dkim
mail._domainkey IN TXT v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w......
_dmarc.example.com. IN TXT v=DMARC1; p=quarantine; sp=quarantine; fo=0; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400; rua=mailto:dmarc.report@example.com; ruf=mailto:dmarc.report@example.com
TXT v=spf1 ip4:91.26.196.29 ~all