You would like to know the MX record for a certain domain.
You can use the dig command and ask for mx records:
dig mx lubby.org
; <<>> DiG 9.3.2 <<>> mx lubby.org
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40151
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 6, ADDITIONAL: 1
;; QUESTION SECTION:
;lubby.org. IN MX
;; ANSWER SECTION:
lubby.org. 86176 IN MX 20 mx01.kundenserver.de.
lubby.org. 86176 IN MX 10 lubby.org.
;; AUTHORITY SECTION:
org. 14283 IN NS TLD6.ULTRADNS.CO.UK.
org. 14283 IN NS TLD1.ULTRADNS.NET.
org. 14283 IN NS TLD2.ULTRADNS.NET.
org. 14283 IN NS TLD3.ULTRADNS.org.
org. 14283 IN NS TLD4.ULTRADNS.org.
org. 14283 IN NS TLD5.ULTRADNS.INFO.
;; ADDITIONAL SECTION:
lubby.org. 85786 IN A 126.96.36.199
;; Query time: 4 msec
;; SERVER: 192.168.123.3#53(192.168.123.3)
;; WHEN: Tue Sep 4 17:07:01 2007
;; MSG SIZE rcvd: 257
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.