My website is located inside a shared server. I must send a contact from my web site to my website's current email address. (Utilizing a spend script to become performed around the shared server.)

I'm curious to understand: Would the bond be channeled externally with the phone/dsl company or perhaps is it channeled internally through the server ?

If externally, how will it be achieved internally ?

telnet mail.mydomain.com 25
...
HELO mail.mydomain.com
...

It might undergo a "fake" loopback interface. i.e., it would be taken with an internal path inside the network stack. You are able to confirm if you take a packet trace through tcpdump or by searching in the headers within the shipped email.