Question and response
Question
dig srv01.mail.infra.rbc.ru. TXT
Answer
srv01.mail.infra.rbc.ru. 1200 TXT "v=spf1 ip4:80.68.240.0/24 -all"
Authority
rbc.ru. 999 NS ns2.rbc.ru.
rbc.ru. 999 NS ns3.rbc.ru.
Additional
ns2.rbc.ru. 1800 A 185.72.229.26
ns3.rbc.ru. 1800 A 80.68.253.26
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0