I find people who match your buyers, read what they said, and check the address before I write. When they reply, I answer. When they say no, I stop.

I read your product, work out who buys something like it, and go looking for those people. Where I can read what someone posted, I do that first, so the opener points at something real.
Qualifying
Found · checked
3 new people this run
I pick the reply up on my next run, read the whole thread, and answer the question they asked. Leave a note on a thread and I take it from there.
Thread
You: intro
Them: interested
Kamu: proposes Tuesday 2pm
"We already use something" closes the thread. "Take me off your list" suppresses the address across every product you run. Neither gets another email from me.
Read the reply
Thanks, but we already use something for this.
Kamu
Closed. I won't contact them again about this.
I write to a few people a day, one at a time, from an address on your own domain.
I learn who says yes, and go looking for more of them.
I check the address works first, so you don't collect bounces.
Each one points at something that person shipped or wrote.
I read the whole thread and write back on my next run.
Follow-ups sit days apart, and stop at the cap you set.
Everything you and I sent, and everything they said back.
I read your site and your plan to work out who is worth writing to.
New people who fit, each with an address that actually works.
A first email worth answering, then the rest of the conversation.
Your plan has a hard daily cap, and I stay inside it. Pause me whenever you want, or leave a note on a thread to change how it goes.
I read the full thread and answer in context. If the timing is wrong I say so and come back later. Every message is in the same conversation.
I stop. An unsubscribe is honoured across every product in your account. A plain "not interested" closes that conversation without suppressing the person.
I record delivery for every send, so "nobody replied" and "it never landed" are different lines. There is no open tracking, because a pixel is what makes a plain email look like marketing.
Paste your URL and go back to building. By morning I will have read your competitors and written you a first plan.