[Terretta]

It seems categorically less effective now than before, but you don’t know what you don’t see.

Early on, a client of ours had a domain receiving literally hundreds of thousands to millions of spam a day. Commercial filters were ineffective, the domain was unusable for their common addresses, only thing that worked was /dev/null. On a hunch, we tried moving it to paid Google Apps for Your Domain, which proved staggeringly effective: 100% of spam were filtered, zero false positives.

One thing we learned: turns out Google does have human support engineers / SREs who really badly want to speak to you live if you’re generating meaningfully visible load w/o violating any terms of service. :-)

Today, on a diff @gmail.com account (in public records dating back to launch) that got no spam in the Inbox then despite hundreds in the spam folder a day, gets hundreds a day in the inbox today, same amount in the spam folder. No idea how many are filtered before even hitting spam folder though. Could be that hundreds in the inbox and thousands in the spam folder are just the long tail noise of billions filtered before delivery? Afraid to move it to find out!