In another privacy flap, Google email riles spam fighters - MarketWatch

If your gmail is not being delivered this could explain why.....In another privacy flap, Google email riles spam fighters - MarketWatch:

"The problems experienced by Schwingel and possibly thousands of other Gmail users are a consequence of Google's sometimes-hawkish policy on privacy. In an unusual practice, Google makes Gmail users virtually anonymous. That's led some spam blockers to occasionally blacklist entire Gmail servers, the massive Google computers that hold many Gmail accounts, because they can't separate the spammers from the legitimate emailers.


Some publicly available black lists, including the widely used Spamhaus list, have a hands-off approach to Gmail to avoid blocking legitimate email. Others, most notably IronPort Systems Inc.'s SpamCop, aren't willing to give Gmail a free pass.

"Gmail has taken an extreme position on privacy that inhibits the antispam community from doing their job, and it's ticking people off," says Tom Gilles, co-founder of IronPort...

....assessing reputation, which requires knowing a senders' identity, is now at the cutting edge of antispam technology. Black lists, which are rosters of spammer IP addresses, are used by many organizations as a first line of defense, though experts stress they should be used with care to avoid blocking legitimate email.

Google's strategy seems to be to attain both reliability and privacy for its email service through the sheer force of its engineering prowess, rather than by hewing to the informal protocols of the Internet community...

Gilles of IronPort says Gmail servers only land on the SpamCop list "every few months," and that Google is good at keeping spammers out of its system and at fixing any problems so its servers are delisted."