root@advancedcraft /opt/mailcow-dockerized # docker-compose exec postfix-mailcow dig google.de
; <<>> DiG 9.11.5-P4-5.1+deb10u1-Debian <<>> google.de
;; global options: +cmd
;; connection timed out; no servers could be reached
ABER
root@advancedcraft /opt/mailcow-dockerized # docker-compose exec postfix-mailcow dig gmx.de
; <<>> DiG 9.11.5-P4-5.1+deb10u1-Debian <<>> gmx.de
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26789
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;gmx.de. IN A
;; ANSWER SECTION:
gmx.de. 30 IN A 82.165.230.36
gmx.de. 86400 IN A 82.165.229.87
;; Query time: 1620 msec
;; SERVER: 127.0.0.11#53(127.0.0.11)
;; WHEN: Mon Jul 20 21:00:02 CEST 2020
;; MSG SIZE rcvd: 67
