Stop blasting generic emails. To keep your domain safe, limit your volume to...
https://canvas.instructure.com/eportfolios/4299058/home/what-does-hyper-targeted-mean-and-how-do-i-do-it-responsibly
Stop blasting generic emails. To keep your domain safe, limit your volume to 50–75 emails per day. Quality is everything; relevance ensures your pitches actually hit real inboxes. Protect your sender reputation before you send one more outreach message