webmail.optimum.net has no TXT records.
Question and response
Question
dig webmail.optimum.net. TXT
Answer
The response has no answer records.
Authority
optimum.net. 7200 SOA authns1.cv.net. postmaster.optimum.net. 2013141602 7200 600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0