bappst009-ext.united-internet.org has no MX records.
Question and response
Question
dig bappst009-ext.united-internet.org. MX
Answer
The response has no answer records.
Authority
united-internet.org. 600 SOA ns-ui.ui-dns.com. dnsadmin.ionos.com. 2017071527 14400 3600 605000 600
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0