Somewhat OT email addresses

[Martin, Jonathan (Contractor)]

I'd say your chances of this working are slim to none.  Most modern MTAs
require a domain name, because they can or do accept email for multiple
domains.  If for example you email user at 1.1.1.1 and 1.1.1.1 accepts
email for company.com and department.company.com its not going to know
where to route that email to.  In the "old days" before virtual hosting
this would more commonly work, but since the concept of NATs came about
and people found out its easier (and cheaper) to secure one external IP
than 12, this concept has been all but quashed.

*IF* by some miracle the mail server can look itself up (i.e. reverse
lookup the ip you are emailing to) and that IP's reverse DNS points to
the mail domain it might work.  Honestly though, someone needs to go to
godaddy.com, spend $5 and renew their domain.

-Jonathan
 

-----Original Message-----
From: redhat-install-list-bounces at redhat.com
[mailto:redhat-install-list-bounces at redhat.com] On Behalf Of Graeme
Nichols
Sent: Wednesday, February 15, 2006 9:30 PM
To: RedHat Install List
Subject: Somewhat OT email addresses

Hello Folks,

I know this is somewhat OT but I was wondering if it is possible to send
an email with an address in the following format; username@[IP address]

I have been fiddling around because a person with whom I was writing to
has suddenly become unknown, possibly because of DNS failure, I'm not
sure, and the mail is returned undeliverable as the domain is unknown. 
They are having the same problem sending mail to me.

I did a ping on my ISP's SMTP mail server and while there was a 100%
failure rate on the packets, most probably due to some firewall setting,
I was given the IP address, in this case, 203.12.160.34

I sent a test email to name at 203.12.160.34 but it bounced with the
following error;

553 5.3.5 203.12.160.34 config error: mail loops back to me (MX
problem?)
554 5.3.5 Local configuration error

Is it possible to do what I am trying and circumvent the DNS?

If SKP can help me I would appreciate it.

-- 

----------------------------------------------------------------------
Kind regards,

Graeme.
----------------------------------------------------------------------

Happiness is having a scratch for every itch.
		-- Ogden Nash

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