Why is mail from the server not reaching Yahoo users?

Why is mail from the server not reaching Yahoo users? The mail sent from the server does not reach to Yahoo users. Whereas sometimes, it appears in spam folder of gmail account.
Asked by: Guest \| Views: 390

Total answers/comments: 2

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Guest [Entry]

You may be on a blacklisted domain/IP/range.

Guest [Entry]

"My IP is blacklisted in the CBL list.

http://cbl.abuseatdotorg

It says:
""This is the maazben spamBOT ""
What does it mean and how should I correct this problem?"