Code:
$ dig tormail.org MX

; <<>> DiG 9.8.1-P1 <<>> tormail.org MX
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43499
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;tormail.org.            IN    MX

;; ANSWER SECTION:
tormail.org.        3600    IN    MX    15 incoming2.tormail.org.
tormail.org.        3600    IN    MX    10 incoming.tormail.org.

;; Query time: 35 msec
;; SERVER: 192.168.178.1#53(192.168.178.1)
;; WHEN: Sun Jun 10 22:10:01 2012
;; MSG SIZE  rcvd: 80

$ 
$ 
$ dig incoming.tormail.org

; <<>> DiG 9.8.1-P1 <<>> incoming.tormail.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1209
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;incoming.tormail.org.        IN    A

;; ANSWER SECTION:
incoming.tormail.org.    3600    IN    A    199.180.253.220

;; Query time: 36 msec
;; SERVER: 192.168.178.1#53(192.168.178.1)
;; WHEN: Sun Jun 10 22:10:20 2012
;; MSG SIZE  rcvd: 54

$ dig incoming2.tormail.org

; <<>> DiG 9.8.1-P1 <<>> incoming2.tormail.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24140
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;incoming2.tormail.org.        IN    A

;; ANSWER SECTION:
incoming2.tormail.org.    3600    IN    A    63.223.125.50

;; Query time: 36 msec
;; SERVER: 192.168.178.1#53(192.168.178.1)
;; WHEN: Sun Jun 10 22:10:26 2012
;; MSG SIZE  rcvd: 55

$ geoiplookup 199.180.253.220
GeoIP Country Edition: US, United States
$ geoiplookup 63.223.125.50
GeoIP Country Edition: US, United States
$
tormail nutzt tor als exitenclave, das schützt nur deine eigene Anonymität, aber nicht den Anbieter davor v& zu werden.