> > An ISP wpuld never be whitelisted anyhow. Whitelisting is for things > like banks and other institutions and organizations that produce no > spam. Yellowlisting is for ISPs so that they don't accidentally get > blacklisted. SPF is useless because few are using it due to the fact > that it just doesn't work.
I too agree with your idea that we should start looking for ham in mails rather than looking for spam. This approach would help us tackle spam much more aggressively. But IMHO SPF works great and is much cleaner. A lot of banks/legitimate bulk email senders change their relay server. Many reasons for that. The most common is that they use a third party to relay their mails and these would keep changing You would have to delist your whitelisted ip before some spammer gets those. And since the whitelist is exposed there is a greater potential for abuse here. Thanks Ram
