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

https://johnathanssplendidcolumns.cavandoragh.org/why-random-emails-to-strangers-is-killing-your-domain-reputation

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