Firstly apologies if this is not the right group for this question but maybe someone can point me in the right direction.
My question is:
say for example and ISP assigns a static IP say 18.104.22.168 and I assign this to my mail server. Can somebody explain how mail is routed to me and why mail would not be routed to somebody somewhere else who assigns 22.214.171.124 to their router.
I understand the process of DNS and how a packet is routed to my ISP name server but how is my ISP nameserver aware of the MAC address of my router in order to route the packet to me?
Thanks in advance