Question and response
Question
dig zixport.com. TXT
Answer
zixport.com. 600 TXT "v=spf1 ip4:199.30.232.0/21 ip4:63.71.8.0/21 ~all"
Authority
zixport.com. 600 NS ns02.zixcorp.com.
zixport.com. 600 NS ns03.zixcorp.com.
zixport.com. 600 NS ns01.zixcorp.com.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0