They stopped wasting time on bad emails
I was running a cold outreach campaign and had a list of 400 emails scraped from LinkedIn. Half of them were bouncing. Used this tool before sending and cut my bounce rate from 34% to under 3%. Game changer honestly.
Our newsletter had about 12,000 subscribers and delivery was getting terrible. I uploaded the whole list here, removed the invalids, and our open rates literally jumped 18% in the next campaign. Simple as that.
Tried a few paid tools before finding this. They all needed accounts and credit cards. This just works. Drag in the Excel file, wait a bit, done. Exactly what I needed for my freelance clients without spending anything.
We collect event registrations through a Google Form and people often mistype their emails. Running the list through here before sending confirmations has saved so many follow-up headaches. Use it every single week now.
Honestly I was skeptical about a free tool doing proper SMTP verification. But it correctly identified three catch-all domains in my list that other services were marking as valid. The detail is impressive for something free.
I run a small recruitment agency. Every day I'm emailing candidates and hiring managers. Before this I had no way to check emails quickly without paying for a big platform subscription. Now I just check them here, takes 2 minutes.
