70.155.100.149 not listed but list.dsbl.org still fails lookup

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To Whom It May Concern:

 

The following is a snippet from the log file from MDaemon that shows what
happens if we use list.dsbl.org to try to trap spam - it does a great job on
the problem emails, and we really want to use it, but in this case, it
doesn't allow an email sent from me to Chuck in the same domain.

 

Here're the particulars:

 

Our office uses BellSouth DSL to connect - we use Outlook as our email
client - Outlook is configured to check our email server
(mail.a-closer-look.com) for incoming emails first (forcing a logon
authentication) before accepting any outgoing emails.  Our office static IP
is 70.155.100.149 . when MDaemon does its due diligence and checks the IP
from the inbound email request, it uses the 'standard' 4 DNS-BL lookups -
however, it fails on list.dsbl.org - when I've tried to check the connecting
IP on your site, it's not listed . all I'm trying to do is find out why the
check fails for the BellSouth IP from our office.  When I remove
list.dsbl.org from the lookup, our internal emails go through fine, but
we're getting dozens of spam hits per hour per account that your site would
catch and we'd like to eliminate the hassle of having to manually delete
them.

 

Please help!  Any information you can provide will be greatly appreciated .

 

Thx,

George A. Petrick

A Closer Look, Inc.

 

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Thu 2006-12-21 09:50:46: Session 7171; child 2; thread 3336

Thu 2006-12-21 09:50:46: Accepting SMTP connection from [70.155.100.149 :
10633]

Thu 2006-12-21 09:50:46: Performing PTR lookup (149.100.155.70.IN-ADDR.ARPA)

Thu 2006-12-21 09:50:46: *  D=149.100.155.70.IN-ADDR.ARPA TTL=(639)
PTR=[adsl-070-155-100-149.sip.asm.bellsouth.net]

Thu 2006-12-21 09:50:46: *  Gathering A records...

Thu 2006-12-21 09:50:46: *  D=adsl-070-155-100-149.sip.asm.bellsouth.net
TTL=(639) A=[70.155.100.149]

Thu 2006-12-21 09:50:46: ---- End PTR results

Thu 2006-12-21 09:50:46: --> 220-a-closer-look.com ESMTP MDaemon 9.5.4; Thu,
21 Dec 2006 09:50:46 -0500

Thu 2006-12-21 09:50:46: --> 220-This server does not relay!

Thu 2006-12-21 09:50:46: --> 220 Unauthorized use prohibited.

Thu 2006-12-21 09:50:46: <-- EHLO gap

Thu 2006-12-21 09:50:46: Performing IP lookup (gap)

Thu 2006-12-21 09:50:46: *  Error: Name server reports domain name unknown

Thu 2006-12-21 09:50:46: ---- End IP lookup results

Thu 2006-12-21 09:50:46: --> 250-a-closer-look.com Hello
adsl-070-155-100-149.sip.asm.bellsouth.net, pleased to meet you

Thu 2006-12-21 09:50:46: --> 250-ETRN

Thu 2006-12-21 09:50:46: --> 250-AUTH=LOGIN

Thu 2006-12-21 09:50:46: --> 250-AUTH LOGIN CRAM-MD5

Thu 2006-12-21 09:50:46: --> 250-8BITMIME

Thu 2006-12-21 09:50:46: --> 250 SIZE 0

Thu 2006-12-21 09:50:46: <-- MAIL FROM: <[email protected]>

Thu 2006-12-21 09:50:46: Performing IP lookup (a-closer-look.com)

Thu 2006-12-21 09:50:46: *  P=010 S=000 D=a-closer-look.com TTL=(28)
MX=[mail.a-closer-look.com] {10.18.61.101}

Thu 2006-12-21 09:50:46: ---- End IP lookup results

Thu 2006-12-21 09:50:46: --> 250 <[email protected]>, Sender
ok

Thu 2006-12-21 09:50:46: <-- RCPT TO: <[email protected]>

Thu 2006-12-21 09:50:46: Performing DNS-BL lookup (70.155.100.149 -
connecting IP)

Thu 2006-12-21 09:50:46: *  bl.spamcop.net - passed

Thu 2006-12-21 09:50:46: *  sbl-xbl.spamhaus.org - passed

Thu 2006-12-21 09:50:46: *  dnsbl.njabl.org - passed

Thu 2006-12-21 09:50:46: *  list.dsbl.org - failed

Thu 2006-12-21 09:50:46: ---- End DNS-BL results

Thu 2006-12-21 09:50:46: 'Recipient unknown' given and connection dropped to
divert future spam

Thu 2006-12-21 09:50:46: --> 550 <[email protected]>, Recipient
unknown

Thu 2006-12-21 09:50:46: SMTP session terminated (Bytes in/out: 98/419)

Thu 2006-12-21 09:50:46: ----------

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