Stop blasting generic emails. To keep your domain safe, limit your volume to...

https://noon-wiki.win/index.php/How_to_Build_a_High-Quality_Outreach_List_Using_Competitor_Backlinks

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