mxcampus.tau.ac.il has no CNAME records.
Question and response
Question
dig mxcampus.tau.ac.il. NS
Answer
The response has no answer records.
Authority
tau.ac.il. 7299 SOA aristo.tau.ac.il. ariel.aristo.tau.ac.il. 2025124917 5400 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0