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It's likely that email messages sent from your server were flagged as spam by Yahoo! users. That said, you have been blocked by Yahoo! internal mail filter system.
Yahoo!, AOL, and other large companies, use their own blacklisting system, so you can be blocked with them even if you aren't on any RBLs.
Thanks Servertune, it just solved now. I sent emails from 3 domains of my server, they went to bulk, I mark them as not spam, after 5min send new email to yahoo, it went to Inbox!
Thanks Servertune, it just solved now. I sent emails from 3 domains of my server, they went to bulk, I mark them as not spam, after 5min send new email to yahoo, it went to Inbox!