Hello,
On some mail servers under my (co-)responsability, the DSBL blacklist is used on smtp-server level to try to fight a little bit against spam.
Problem: some customers online via gprs are unable to send mails over these servers, because their external visible IP adress (gprs01.swisscom-mobile.ch: 193.247.250.1) is blacklisted on several lists:
http://www.robtex.com/rbls/193.247.250.1.html http://dsbl.org/listing?193.247.250.1
We asked swisscom why they don't try to get away from these lists, but the answer is that we should rather whitelist them: "Die grösseren Schweizer Internet Service Anbieter haben sich vielmehr darauf geeinigt, die IP Nummern von Zugangsanbietern wie Swisscom Mobile auf ihre WhiteList zu nehmen."...
Do you think it's the correct way to react? :)
Delisting from dsbl.org wouldn't work anyway, at least until abuse or postmaster adresses are created:
Final-Recipient: rfc822;abuse@swisscom-mobile.ch Action: failed
Final-Recipient: rfc822;postmaster@swisscom-mobile.ch Action: failed
General question: are you (the postmasters around) using blacklists like dsbl or spamhaus directely on smtp-level (directely rejecting the mails from listed IP's) or only after (like in spamassassin & co.) ?
regards, Olivier