Open relay and spam listed

[dajomu]

I got a problem. At work we got problem sending mail to some customers because their spamfilter blocked us. I found out that we are listed on the site

http://cbl.abuseat.org

for having an open relay. So I went to the site

http://www.abuse.net

and the test came out like this.

How do I handle this open relay? The server do not act as an open relay I know. I am using NAT and the test did not produce anything. It just register that port 25 is open.
I also have an e-mail account on

http://www.start.no

wich support smtp. Why aren`t they listed? They got to have port 25 open as well?

Sorry for a long output (the ip is not the real one):

----------------------
Mail relay testing
Connecting to 001.002.003.004 for registered user test ...

<<< 220 my.server.no ESMTP
>>> HELO

http://www.abuse.net

<<< 250 my.server.no
Relay test 1
>>> RSET
<<< 250 flushed
>>> MAIL FROM:<spamtest@abuse.net>
<<< 250 ok
>>> RCPT TO:<xxx@xxx.no>
<<< 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
Relay test 2
>>> RSET
<<< 250 flushed
>>> MAIL FROM:<spamtest>
<<< 250 ok
>>> RCPT TO:<xxx@xxx.no>
<<< 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
Relay test 3
>>> RSET
<<< 250 flushed
>>> MAIL FROM:<>
<<< 250 ok
>>> RCPT TO:<xxx@xxx.no>
<<< 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
Relay test 4
>>> RSET
<<< 250 flushed
>>> MAIL FROM:<spamtest@[001.002.003.004]>
<<< 250 ok
>>> RCPT TO:<xxx@xxx.no>
<<< 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
Relay test 5
>>> RSET
<<< 250 flushed
>>> MAIL FROM:<spamtest@001.002.003.dslcustomer.pcsupport.no>
<<< 250 ok
>>> RCPT TO:<xxx@xxx.no>
<<< 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
Relay test 6
>>> RSET
<<< 250 flushed
>>> MAIL FROM:<spamtest@[001.002.003.004]>
<<< 250 ok
>>> RCPT TO:<xxx%xxx.no@[001.002.003.004]>
<<< 250 ok
>>> DATA
<<< 354 go ahead
>>> (message body)
<<< 250 ok 1126688426 qp 30864
Relay test result
Hmmn, at first glance, host appeared to accept a message for relay.

THIS MAY OR MAY NOT MEAN THAT IT'S AN OPEN RELAY.

Some systems appear to accept relay mail, but then reject messages internally rather than delivering them, but you cannot tell at this point whether the message will be relayed or not.

If it is really an open relay, the test message will be delivered to you. If you do not receive the test message in your e-mail in the next few hours, it IS NOT an open relay.

--------------------------

 

[thedaver]

So what happened with the delivery of the final test's open relay assertion?

D.E.R. Management - IT Project Management Consulting

http://www.dermanagement.com/

 

[dajomu]

As I wrote the test didn't produce anything. If this really was an open relay the test should have produced an e-mail to the given e-mail address, but it didn't. I am sure this isn't an open relay, it only appears so because of the NAT.

 

[thedaver]

>>> RSET
<<< 250 flushed
>>> MAIL FROM:<spamtest@[001.002.003.004]>
<<< 250 ok
>>> RCPT TO:<xxx%xxx.no@[001.002.003.004]>
<<< 250 ok
>>> DATA
<<< 354 go ahead
>>> (message body)
<<< 250 ok 1126688426 qp 30864
Relay test result
Hmmn, at first glance, host appeared to accept a message for relay.

THIS MAY OR MAY NOT MEAN THAT IT'S AN OPEN RELAY.

IMHO, the test produced a situation in which your email server accepted email it should not have. This is not a function of NAT.

Frankly, this kind of crap happens all the time with the spamhauses being so vigilant that you get listed.

The easiest way to resolve this is to either:
1) Relay your email through another server to reach the desired destination,
AND
2) Work with the spamhaus that blacklisted you and encourage them to review your case. But don't get your hopes up, some of the spamhaus are headless vigilante groups who don't have a formal interface/response mechanism to fix mis-listings.


D.E.R. Management - IT Project Management Consulting

http://www.dermanagement.com/

 

[dajomu]

As it only takes a few days from the time of listing 'til all the spamlists around the world is updated, asking the spamhauses to remove me costs more than it tastes. I figured out that the easies way to get around the problem is as you say to relay my email through another server. This is what I am doing at the moment. Or I could change my IP-address.

Anyway, thanks for helping out.

DaJoMu