sfw1.telasera.com has no MX records.
Question and response
Question
dig sfw1.telasera.com. MX
Answer
The response has no answer records.
Authority
telasera.com. 3600 SOA ns1.dnsafrica.com. hostmaster.telasera.com. 2025060301 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0