[eloisius]

My solution is a little heavy handed, but if a recruiter email doesn't include the company, position, and a salary range, it's spam and I mark it as such. If they send me a "just checking in after my last email," I add their domain to a rule in Fastmail. The rule sorts them into a folder and classifies them as spam. I'm not sure if Fastmail sends a spam complaint, but I hope so. Email-sending services tend to take those complaints somewhat seriously because it can torch the reputation of their IP addresses.