encomming mail MX record ?

Hi,
I am trying to find out the procedure i followed for my incoming mails.
I have done with dynamic Ip,using dyndns for domain and configured postfix for relaying through my ISP.Right now i am able to send as well as receive mails as user@my_domain to local and external mail ID's.Now i would like to know who is responsible for my MX record ? is there any way to find out who is forwarding my mail to my domain (i am not using dysdns for mail MX record).
Thanks

 

$ dig <yourdomain> MX
________
Environmental Disorders Forums
________
Iolite Portable Herbal Vaporizer

 

Thanks, but this will point to dyndns server for sure and i have already mentioned i am not using dyndns for mail.

 

If you want to find out the authoritative name servers for your domain, run

Code:

dig ns yourdomain.com

 

but both the commands will give the same result ..
pls see the output:

dig my_domain_name MX


;; AUTHORITY SECTION:
my_domain_name. 1800 IN SOA ns1.dyndns.org. hostmaster.dyndns.org. 2063968927 10800 1800 604800 1800

;; Query time: 145 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Jan 24 21:27:31 2009
;; MSG SIZE rcvd: 97


dig ns my_domain_name

;; AUTHORITY SECTION:
my_domain_name. 1800 IN SOA ns1.dyndns.org. hostmaster.dyndns.org. 2063968892 10800 1800 604800 1800

;; Query time: 215 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Jan 24 21:25:42 2009
;; MSG SIZE rcvd: 97

i have configured postfix for relaying through my ISP mail server so i can send mail externally but i am able to receive mails as user@my_domain_name from internet too.now i want to know who is responsible for my incoming mail.

 

Did you set nameservers in your registrar's web interface?