ibb.ubs.com has no MX records.
Question and response
Question
dig ibb.ubs.com. MX
Answer
The response has no answer records.
Authority
ibb.ubs.com. 30 SOA uranus.ubs.com. ncc-internet.ubs.com. 756 10800 3600 2592000 30
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0