The Optimus Blog
Insights, playbooks, and product updates on email verification, lead discovery, and AI-powered outbound.
cold emailinbox rotation
How I burned my domain in 3 days – and what I did to save it
By Thursday morning, I couldn’t send a single email. My domain had been flagged by Gmail, Microsoft, and every major ISP. My bounce rate hit 12%. My open rates plummeted to 0.5%. And worse – all my future emails from that domain, even personal ones, were landing in spam.
admin·Jun 30, 2026·4 min read
leadscold email
I wrote 4,000 cold emails in 3 months. Then I let AI take over.
I did that for three months. I sent over 4,000 emails. My reply rate hovered around 1.8%.
admin·Jun 30, 2026·4 min read
leadscold email
How I stopped guessing and started finding the right prospects in minutes
How to find quality leads
admin·Jun 30, 2026·5 min read
Get the next post in your inbox
No spam. Unsubscribe anytime.