Question and response
Question
dig imail4.swbc.com. TXT
Answer
imail4.swbc.com. 3600 TXT "v=spf1 a:_mailhosts.swbc.com -all"
Authority
swbc.com. 172800 NS ns-1289.awsdns-33.org.
swbc.com. 172800 NS ns-1872.awsdns-42.co.uk.
swbc.com. 172800 NS ns-570.awsdns-07.net.
swbc.com. 172800 NS ns-58.awsdns-07.com.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0