"The reverse DNS of 195.235.203.138 is mail.emvs.es, but the A/AAAA DNS records for mail.emvs.es do not resolve to 195.235.203.138",
"The domain 156.red-195-235-203.customer.static.ccgg.telefonica.net does not exist",
"The reverse DNS of 195.235.203.156 is 156.red-195-235-203.customer.static.ccgg.telefonica.net, but the A/AAAA DNS records for 156.red-195-235-203.customer.static.ccgg.telefonica.net do not resolve to 195.235.203.156"