>From: Matus UHLAR - fantomas <uh...@fantomas.sk> >> Seems to me like >>Yahoo doesn't have a good list of IPs so they took this shortcut >>which is technically legitimate but it's making up for their incompetence >>not having a handle on their mail flow.
>That doesn't mean incompetence. using PTR is official way, and while not so >often used, it's perfectly valid. >The whole fact you want their IP ranges does not mean they are not competent >when they don't publish them in SPF. >the fact that you can't whitelist their IPs based on their SPF record does >not mean there's anything wrong with the SPF record itself... Read back through this thread. I never said their SPF record is invalid. All I said is their SPF record is not common and it makes it very hard for anyone to know what the official Yahoo outbound mail servers are. We have to work very hard to get our MTAs to whitelist them. It's in their own best interest to make this information easily available to the Internet since so much spam comes out of their platform. They are too large to not whitelist. An SPF record is a useful way to build such a whitelist when it can be parsed into IPs and CIDRs. That is all.
