mx26.unicsbg.net has no MX records.
Question and response
Question
dig mx26.unicsbg.net. MX
Answer
The response has no answer records.
Authority
unicsbg.net. 7200 SOA ns1.globcom.net. admin.globcom.net. 2019030511 28800 7200 86400 86400
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0