44.193.121.189.
52.70.130.33.
52.73.203.75.
Question and response
Question
dig mailer.tipalti.com. PTR
Answer
mailer.tipalti.com. 300 PTR 44.193.121.189.
mailer.tipalti.com. 300 PTR 52.70.130.33.
mailer.tipalti.com. 300 PTR 52.73.203.75.
Authority
tipalti.com. 300 NS ns-1356.awsdns-41.org.
tipalti.com. 300 NS ns-1949.awsdns-51.co.uk.
tipalti.com. 300 NS ns-254.awsdns-31.com.
tipalti.com. 300 NS ns-611.awsdns-12.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0