Re: [IMail Forum] reverse DNS

[Matt]

FIVE-TEN knowingly lists DSL blocks regardless of whether or not they are known to be static or dynamic.  They also have pretty much all of China listed.  This is what makes FIVE-TEN next to useless.  There's a lot of zealotry at work in blacklists, and some are quite extreme with their methods.  Even DNSBL has a policy of never retiring old listings, and their rules are so strict that it is next to impossible to get a third-party's IP removed without bothering an administrator outside of their removal process (the request is sent to contacts generated by ARIN and the reverse DNS domain, which much of the time don't correspond to the server in question). Matt E. Shanbrom (Ipswitch) wrote: Out of curiosity, which list has you listed? Some will block whole ranges that they believe to be Dynamic (DSL/Cable/dial-up) just from their name returned from the PTR lookup.....Although mine is static it returns: Asking dns2.knology.net. for 118.172.214.24.in-addr.arpa PTR record: Reports user-24-214-172-118.knology.net. [from 24.214.63.67] Answer: 24.214.172.118 PTR record: user-24-214-172-118.knology.net. [TTL 600s] [A=24.214.172.118]IF you run this IP through the spam database lookup you will see that at least one (Five-Ten) has it blocked as being a part of a range that they block.YOu should get with your provider and make sure your IP is not part of a Dynamically assigned block at all and doesn't return a name that might indicate it isEric S ----- Original Message ----- From: "Adam Campbell" <[EMAIL PROTECTED]> To: <IMail_Forum@list.ipswitch.com> Sent: Wednesday, March 23, 2005 4:16 PM Subject: Re: [IMail Forum] reverse DNS Yep: 220 odin.robinsonmfg.com SMTP; Wed, 23 Mar 2005 16:14:30 -0500 adamc Greg Kesler wrote: Many mail admins are more likely to manually block an IP if a complaint is received and it does not have a PTR entry that matches the forward lookup. Another factor to consider is the greeting that the mail server states when you telnet (smtp) to it. Does the mail servers greeting message have a FQDN? A correct example would be: "220 ms-smtp-04.nyroc.rr.com ESMTP Welcome to Road Runner. WARNING: *** FOR AUTHORIZED USE ONLY! ***" Vs. Incorrect: "220 mail damon ESMTP ..." or "220 bigcompany ..." or "220 10.10.10.10" (Ip used only as example) -Greg. To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ -- ===================================================== MailPure custom filters for Declude JunkMail Pro. http://www.mailpure.com/software/ =====================================================