Quote:
Originally Posted by Tiko
Toto
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That is something - even if ordinary email users do not know how many emails are going undelivered our technical guardians do - but do they do anything about it?
I have yet to see any evidence that ntl technical support have any knowledge of the process (based on response or lack of to my enquiry)
I don't know about these lists being dynamic especially reading this bit on SORBS website
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Please note that entries in the SORBS DUHL never expire, not even the entries we inherited from Easynet NL Dynablock. We always require contact from the network owner for modifications.
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This relates to (for example)
Netblock: 82.1.32.0/19 (82.1.32.0-82.1.63.255)
Record Created: Thu Sep 16 13:37:21 2004 GMT
Record Updated: Thu Sep 16 13:37:21 2004 GMT
Additional Information: Dynamic/Generic IP/rDNS address, use your ISPs mail server or get rDNS set to indicate static assignment.
Currently active and flagged to be published in DNS
These are IPs allocated by ntl to their users on the SORBS list since 2004 if I am reading this correctly. (I know this is the other side of the coin - potential blocking of mail going out from ntl users but it makes the point.)
---------- Post added at 20:50 ---------- Previous post was at 20:42 ----------
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Ahh, ok, what you are refering to there is a list of IP addresses that are dynamically assigned, that list is a little different.
In a nut shell all IP's in that list should not be running their own mail server other than the mail server matching the MX record of the domain in question.
Those lists are built in conjunction with the ISP's to help networks to make decisions about whehter to accept emails from dynamic IP addresses that are running their own mail servers, something that is generally accepted should not be happening.
What does his mean in practice therefore for a dynamic ntl IP address?
If the source IP address is using a known ntl SMTP server, such as smtp.ntlworld.com, then the email will be passed for delivery, however, if it is not an ntl mail server, then the recipient server will reject the email if it uses the SORBS DUHL. I think that's a pretty basic explanation, if anybody more techy wants to chip in, please do.
The Block Lists are dynamic, and an explanation of the spamcop listing policy can be found
here
Really hope that helps a little more.