[TriLUG] Trouble sending mail to RR addresses

[Peter Long]

I vaguely remember a heated discussion of this issue several months ago 
however I cannot seem to find it in the mail archives. I would 
appreciate a pointer to the relevant archived discussion of any help 
anyone is able to offer.

I just tried sending mail to someone @nc.rr.com and it bounced with the 
following error:

Feb 17 18:07:52 albert postfix/smtp[24719]: D17753B1B4: 
to=<someone at nc.rr.com>, relay=ncmx03.mgw.rr.com[24.25.4.97], delay=1, 
status=bounced (host ncmx03.mgw.rr.com[24.25.4.97] said: 550 5.7.1 Mail 
Refused - 24.25.31 - See http://security.rr.com/mail_blocks.htm#security 
- 20031206)

This is something relatively new since I distinctly remember not having 
this problem the last time it was discussed on the list. Unfortunately I 
cleaned out my Sent Items folder the other day can cannot tell when last 
I successfully set to an nc.rr.com email.

According the the page supplied in the error message, this error 
indicates one of the following:

1. The sending machine or network has a security problem associated with 
it, which resulted in the sending of unsolicited bulk mail to our 
subscribers or role accounts.
2. The sending machine or network is actively attacking our mail servers 
(mailbomb, DoS attack, etc).
3. The sending machine or network is located within a dynamically 
assigned IP address pool, and the ISP owning that pool has a stated "no 
server" policy.
4. The sending machine or network is not in compliance with Road 
Runner's posted Inbound Sending Policies

I assume I could fix 1,2 and 4. However if 3 is the case I would be 
stuck. Correct?

I am pretty sure my postfix server is configured not to relay anything. 
It should only accept mail destined for my domain or mail from my 
private network. Here is the content of main.cf:

myorigin = $mydomain
mydestination = $myhostname, localhost.$mydomain, $mydomain, 
mail.$mydomain, www.$mydomain, ftp.$mydomain
mynetworks = 192.168.0.0/24.0, 127.0.0.0/8

I suspect that I am being bounced because I am using a Dynamic IP 
address. However, I am sure that there are others on this list running 
there own mail server on RoadRunner with dynamic IP's. Is anyone else 
having this problem?

--
Peter Long