bounce.spread55.com has no MX records.
Question and response
Question
dig bounce.spread55.com. MX
Answer
The response has no answer records.
Authority
spread55.com. 86400 SOA ns1.onlydomains.com. root.onlydomains.com. 2018061401 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0