>From: Matus UHLAR - fantomas <[email protected]> >Still no practical difference between using IP ranges or rdns in SPF.
Most SPF records published are not like this. 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. They could have specific mail ranges that all of their outbound mail comes from all over the world and keep that pretty static so the rest of us could properly whitelist their email. >Well - if postscreen was able to use rdns, this discussion would be useless, >since you'd whitelist .yahoo.com in postscreen, wouldn't you? Ok. Postscreen doesn't use RDNS. I stand corrected. I will try to solve this problem in my Postfix settings since it does use RDNS. If not, I guess I will give up and continue to have the occassional issue woth inbound mail from Yahoo. I doesn't happen often, I was just trying to handle Yahoo mail in MailScanner/ SpamAssassin compeltely by letting through the MTA.
