[ceph-users] why not block gmail?

If you don't block gmail, gmail/google will never make an effort to clean up their shit. I don't think people with a gmail.com will mind, because this is free and get somewhere else a free account. tip: google does not really know what part of their infrastructure is sending email so they use spf ~all. If you process gmail.com and force the -all manually, you block mostly spam.