mail2.blackbaudservices2.com has no CNAME records.
Question and response
Question
dig mail2.blackbaudservices2.com. NS
Answer
The response has no answer records.
Authority
blackbaudservices2.com. 3600 SOA d2pbbpubdns01bv.blackbaudhost.com. postmaster.blackbaudhost.com. 54 3600 600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0