Even though i've done my homework and did quite a lot of googleing, I couldn't find the answer to one question about mx records, though.
I have a domain with godaddy.com (email@example.com). I am using their DNS-manager. I set the MX record of my website to: "myaddress.is-a-geek.com.". (is-a-geek.com" part is from my dyndns.com account). "myaddress.is-a-geek.com" itself (A-record) resolves to my real ip, which my smart ;-) router updates every time the ip changes.
I was wondering if in this case, if i send email to firstname.lastname@example.org
(my godaddy.com domain), the mail would go to my real ip address (myaddress.is-a-geek.com (A) = 18.104.22.168), and get to my mailserver, behind a firewall, where ports 25 and 110 are open.
Question: Does myaddress.is-a-geek.com need an MX record in order for everything to work??
If it should work, i have some other problems ...
Is this how it is supposed work??