Definition
Traditional filters classify messages after they arrive. sift.mx puts a public handle and a pay-to-deliver gate in front of your inbox so low-intent senders never get a free shot at you.
Filters clean up; covers price access
Bayesian filters, blocklists, and newsletter promotions tabs reduce noise inside an address that is already public. sift.mx changes what “public contact” means: the address you share is a gated alias.
False positives vs false free
Aggressive filters bury real mail. Open inboxes admit infinite free asks. Whitelists plus covers aim for a third path: known people free, unknowns explicitly costly.
Use both when you want
You can still run normal spam protection on the destination inbox. sift.mx is the outer gate and privacy layer—not a claim that provider filters are useless.