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I looked at those posts, I couldn't see any mention of using a fixed IP. <br />
I'm looking at <a href="https://help.ubuntu.com/community/Postfix" rel="ugc">https://help.ubuntu.com/community/Postfix</a>&nbsp;where every all the examples are showing mail.sample.com, can I use a fixed IP address for that? I heard that mail servers need an MX record to receive mail, does that require a domain?
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I looked at those posts, I couldn't see any mention of using a fixed IP.
I'm looking at https://help.ubuntu.com/community/Postfix [https://help.ubuntu.com/community/Postfix] where every all the examples are showing mail.sample.com, can I use a fixed IP address for that? I heard that mail servers need an MX record to receive mail, does that require a domain?

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Sorry, total beginner with mail servers, but I've got an Ubuntu box at Rackspace which only has a fixed IP address. I would like to setup postfix to use this rather than a domain, is that possible??
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Sorry, total beginner with mail servers, but I've got an Ubuntu box at Rackspace which only has a fixed IP address. I would like to setup postfix to use this rather than a domain, is that possible??

Setup SMTP/Pop3 with IP address

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.