[user@server ~]$ dig mx wanadoo.fr
; <<>> DiG 9.3.1 <<>> mx wanadoo.fr
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21592
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 15
;; QUESTION SECTION:
;wanadoo.fr. IN MX
;; ANSWER SECTION:
wanadoo.fr. 3600 IN MX 10 smtp.wanadoo.fr.
;; AUTHORITY SECTION:
wanadoo.fr. 1077 IN NS ns2.wanadoo.fr.
wanadoo.fr. 1077 IN NS ns11.wanadoo.fr.
wanadoo.fr. 1077 IN NS ns.wanadoo.fr.
wanadoo.fr. 1077 IN NS ns10.wanadoo.fr.
;; ADDITIONAL SECTION:
smtp.wanadoo.fr. 600 IN A 80.12.242.142
smtp.wanadoo.fr. 600 IN A 80.12.242.148
smtp.wanadoo.fr. 600 IN A 193.252.22.65
smtp.wanadoo.fr. 600 IN A 193.252.22.78
smtp.wanadoo.fr. 600 IN A 193.252.22.92
smtp.wanadoo.fr. 600 IN A 193.252.23.67
smtp.wanadoo.fr. 600 IN A 80.12.242.9
smtp.wanadoo.fr. 600 IN A 80.12.242.15
smtp.wanadoo.fr. 600 IN A 80.12.242.53
smtp.wanadoo.fr. 600 IN A 80.12.242.62
smtp.wanadoo.fr. 600 IN A 80.12.242.82
ns11.wanadoo.fr. 9 IN A 80.12.255.152
ns10.wanadoo.fr. 9 IN A 80.12.255.23
ns.wanadoo.fr. 1178 IN A 80.12.255.24
ns2.wanadoo.fr. 1077 IN A 80.12.255.159
[user@server ~]$ telnet smtp.wanadoo.fr 25
Trying 193.252.22.65...
Connected to smtp.wanadoo.fr (193.252.22.65).
Escape character is '^]'.
220 mwinf2017.orange.fr ESMTP **************************
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