Thread: I.P address questions

Is the ip address that was given to you by your internet service provider different from the ip address of your domain name hosted by a server? If I send an email using a mail server, what is the ip address that the recepient will see? A mail server has it's own IP right?

yes its different from your domain the person will probably see the IP of the domain if that is where the mail server is

It won't show your IP, it will show the IP that the mail server uses. This is also not necessarily the same as your domain IP as all mail on the server you are hosting your website from will use the same mail server IP for all domains on the server whether the domain is on its own dedicated IP or not.

thanks for the response guys, I did a forward dns on one of our domain, the ip result of that forward dns and the ip of the header from our email is the same.


From info@domain.ph Wed May 21 01:02:57 2008
Return-Path: <nobody@host.company.com>
Authentication-Results: mta684.mail.mud.domain.com from=domain.ph; domainkeys=neutral (no sig)
Received: from (edited ip- 00.00.00.00) (EHLO host.company.com) (ip numbers)
by mta684.mail.mud.domain with SMTP; Wed, 21 May 2008 02:02:32 -0700
Received: from nobody by host.company.com with local (Exim)
for email@domain.com; Wed, 21 May 2008 10:02:57 +0200

So what is the ip in the header of our email ? Is that the i.p of our domain or our mail server?
Is it possible that the ip of a domain and the mail server the same numbers?

yes it is totally different...

Ok I see. I did a forward dns of our host company domain which also host several domains. After getting the ip of that test, i tried to reverse dns that ip. Here are the results below of the reverse dns.

Hostname: server-center.net <--what is this domain, is this the one hosting our main domain? In which in return is also hosting several domains of our company. Does the server that we used belong to this server-center.net?

For additional info, i have access to the whm control panel, so I assume we used this to host our websites. I have asked this question cause I am looking at this spf thing, I might make a wrong configuration if ever I try this spf in the future.

An e-mail sent out will have the IP address of your smtp (sending) mail server AND your own IP address in the header.

ok i see, but can you see the ip of your mail server on the header or not?

yup both ip adress are different

Yes, the IP of the mail server will be next to the mail server in the header.