Is DNS MX Record Required For Email?
Scooby at Scooby.doo
Sun Feb 12 23:22:31 UTC 2006
Is it possible to by-pass the DNS lookup for email like it is for HTTP and
FTP? Is there something about the MX record in DNS that requires a
"User at DomainName.com" type address for it to work?
Here's why I ask.
I have a static, always-on IP address coming into my house. I run Web and
FTP servers on my PC. They work fine, and have for a long time. My OS is
Windows NT 2000 Professional.
When I scan my ports from a remote machine I get what I expect, which is:
21 (FTP): Open
25 (SMTP): Open
80 (WWW): Open
110 (POP3): Open
143 (IMAP): Open
I only share data with people I do business with. I prefer to just use my IP
address instead of aliasing it with a domain name. (For these examples I'll
use "22.214.171.124", which is of course not my IP. But it's easier to type.) There
is no DNS entry for "126.96.36.199" anywhere.
"http://188.8.131.52" gets into my web server without a problem.
"ftp 184.108.40.206" (DOS prompt) gets to my FTP folder without a problem.
But..., when I send an email to "User at 220.127.116.11" it fails. I have a mail
account with a Windows based ISP and am experimenting sending mail from it
to "User at 18.104.22.168". It doesn't work.
I have my the mail server on my machine configured correctly. And have the
domain/accounts set up like they should be, including a "User at 22.214.171.124"
Any thoughts/tips greatly appreciated.
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